A novel, environmentally friendly, near-infrared (NIR) solar reflective yellow pigment has been successfully developed by incorporating bismuth (Bi3+) and vanadium (V5+) into the yttrium phosphate (YPO4) host lattice. Y(1-x)BixP(1-y)VyO4 (x = y = 0-1) materials with different composition were synthesized using two distinct approaches: the flux-assisted solid-state method (SSM) and the co-precipitation technique (CPS), and the results were compared. A drastic shift in the absorption curve towards higher wavelengths is observed for the materials synthesized by the solid-state reaction method and co-precipitation at 900 degrees C. Secondary phases were noticed in both methods of preparation due to the high ionic radii of the dopant ions. Notably, the simultaneous incorporation of Bi3+ and V5+ significantly enhanced both the NIR solar reflectance and the intensity of the yellow color in the synthesized materials. The co-doping effect induced a well-defined morphology, improving the light-scattering efficiency and boosting the NIR solar reflectance. The optimized composition, Y0.4Bi0.6P0.4V0.6O4, achieved a high reflectance value of 54.64%, compared to just 38% for the undoped host. With a vivid yellow body color, high solar reflectance (54.64 %), and excellent stability, Y0.4Bi0.6P0.4V0.6O4 emerges as a promising, sustainable alternative for cool yellow pigments in energy-efficient coatings and architectural applications.

Herein, we have developed a highly sensitive chemiresistive TiO2 2 doped metal-organic framework(MOF) composite-based sensor for ammonia detection at room temperature. Two novel Ti-MOFs@TiO2 2 composites are developed employing terephthalic acid and 2-amino terephthalic acid as organic linkers with Titanium tetra isopropoxide (TTIP) as a metal source by solvothermal technique. The morphology and crystallinity of synthesized compounds were characterized by using Field-emission scanning electron microscopy (FE-SEM) with EDX analysis, X-ray diffraction (PXRD), XPS and Brunauer-Emmett-Teller (BET) analysis techniques. MIL-125@TiO2 2 sensors exhibited a more specific surface area (374.74 m 2 g- 1 ) than the other three compounds. For gas-sensing applications, all composite materials were exposed to different gas vapours like ammonia, formaldehyde, acetic acid, ethyl alcohol, acetone, xylene, toluene and benzene at room temperature. The sensing results indicate that the sensors exhibit excellent response at low concentrations of ammonia, formaldehyde and acetic acid gases (1 ppm level). The enhanced sensor response was attributed to MIL-125@TiO2 2 (85 response at 50 ppm) and NH2- 2- MIL-125@TiO2 2 (71 response at 50 ppm) towards ammonia gas and shows a better selectivity, sensitivity and repeatability to ammonia gas. All the materials exhibited less response times (between 8 and 45 sec) and more recovery times (between 13 and 125 sec).

Metal–organic frameworks (MOFs) possess great potential for detecting toxic gases for environmental remediation and developing clean energy storage systems. Herein, two porphyrin-based MOF composites (Zn-TCPP@PVP and Ni-TCPP@PVP) were synthesized and successfully applied for selective detection of ammonia and supercapacitor applications. M-TCPP@PVP (M = Ni, Zn) polymer composite MOFs are controllably synthesized using Ni and Zn metal ions and TCPP (tetrakis-(4-carboxyphenyl) phosphonium porphyrin) organic linker in presence of polyvinyl pyrrolidone (PVP) modulator. All prepared materials were characterized by XRD, FT-IR, SEM, BET and XPS techniques. The obtained M-TCPP@PVP (M = Ni, Zn) composites were used as a sensing materials for ammonia, formaldehyde, ethanol, and acetic acid. The Ni-TCPP@PVP composite exhibits twofold more sensing activity towards ammonia gas than the Zn-TCPP@PVP composite at 50 ppm, with sensing response of 61 and 32.7 respectively. In addition, M-TCPP@PVP (M = Ni, Zn) MOFs with excellent surface area, high electrical conductivity and thermal stability, have been explored for supercapacitor applications. In a three-electrode measurement, Ni-TCPP@PVP composite delivered high specific capacity of 205 C g−1, whereas Zn-TCPP@PVP composite delivered only 98 C g−1 at a current density of 1 A g−1. Moreover, the as-fabricated symmetric supercapacitor device (Ni-TCPP@PVP‖Ni-TCPP@PVP) utilizing Ni-TCPP@PVP material delivers a maximum energy density of 12 Wh kg−1 and power density of 3770 W kg−1. The present study explores the potential of porphyrin-based M-TCPP@PVP (M = Ni, Zn) MOFs for the detection of toxic gases and for the next generation charge storage applications.

Stability of a bulk-optical resonator is a very important factor in the cavity analysis. The stability of a resonator depends on the properties and arrangement of the optical components, basically the curvature of reflecting surfaces, other focusing effects, and the distances between the components. When a parameter such as cavity length or the radius of curvature of the focusing element in the resonator is varied, the cavity stability also changes. This paper presents a concise and very simplified design and modeling of a ‘L’ shaped cavity, with reflecting and refracting elements along with two curved mirrors (cavity mirrors) using ABCD matrix and also the importance of an optical element used in L-cavity. The stability is calculated from the ABCD matrix and analyzed using cavity parameters like cavity length and radius of curvature. The stability of the L-cavity is analyzed by varying the length of the cavity from 100 mm to 1500 mm. The L-cavity is stable up to 1500 mm for mirror as intra cavity element and is stable beyond 1500 mm also for TIR (Total internal reflection) prism as intra cavity element. Similarly, the radius of curvatures of mirror and prism also varied from 100 mm to 2500 mm. The L-cavity is stable from 300 mm in mirror case and further also. The L-cavity is stable from 100 mm in TIR prism case and further also. The power distribution of laser beam is also simulated and analyzed for both mirror and TIR prism L-cavity using ZEMAX tool in non sequential mode. From the stability point and other properties of an optical element used in the L-cavity, the importance of the mirror and TIR prism is also studied and also which optical element is preferred for further ring cavity applications.

In the present work, we fabricated 1:1 bimetallic ZnCu(NA); ZnCd(NA); and ZnCo(NA) metal organic frameworks (MOFs) using nicotinic acid (NA) as organic linker by solvothermal method. All the compounds were charac-terized by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, X-ray photoelectron Spectroscopy (XPS), and scanning electron microscopy (SEM).The drop-casting method used to develop a chemiresistive sensor to sense Volatile Organic Compounds (VOCs) at room temperature. These bimetallic sensors exhibited excellent sensitivity and good linearity in detecting formalde-hyde at 1 to 50 ppm range. The responses of all sensing materials towards formaldehyde gas at 50 ppm con-centration are Cu(NA) 3.74, ZnCu(NA) 18.6, Cd(NA) 3.13, ZnCd(NA) 8.36 and ZnCo(NA) 28.3.The sensing times of Cu(NA), ZnCu(NA), Cd(NA), ZnCd(NA) and ZnCo(NA) are 17, 9, 15, 18 and 17 respectively. These results demonstrate the potential applications of bimetallic Zn/Cu, Zn/Cd, and Zn/Co MOFs for sensitive and specific formaldehyde detection at ambient temperature. These results show that ZnCo(NA) sensing material is an excellent selective sensor for formaldehyde sensing.

The wide spread development of electro-optical system from telecommunication to space technologies has increased the demand of customized optics. In the present work, the design of a wide-angle laser range sensor has been presented. The dependence of field of view (FOV) and active area of sensor on effective focal length of the optical system has been demonstrated. A receiving optical system is designed with a wide FOV of 40°, having detector active area of 5 mm. A good agreement is found between the realized and designed optical system. Numerical simulation has shown a strong dependence of refractive index on the performance of the system.

Abstract In the present work, we fabricated 1:1 bimetallic ZnCu(NA); ZnCd(NA); and ZnCo(NA) metal organic frameworks (MOFs) using nicotinic acid (NA) as organic linker by solvothermal method. Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, X-Ray Photoelectron Spectroscopy (XPS), and scanning electron microscopy (SEM) were used to describe all bimetallic MOF topologies. These compounds were used to develop chemiresistive sensor devices for sensing of formaldehyde vapor at room temperature. Drop-casting method was used to make the sensing device on a glass plate with silver electodes. The resulting bimetallic sensors exhibited excellent sensitivity, good linearity and more stability in the detection of formaldehyde at 1 to 50 ppm concentrations. ZnCo(NA) exhibited more response towards formaldehyde vapor than other bimetallic MOFs. Transient response analysis was used to determine response and recovery times, as well as stability over time. These findings prove the application prospects of bimetallic Zn/Cu, Zn/Cd and Zn/Co MOFs in the selective and sensitive detection of formaldehyde at room temperature.

A novel bimetallic ZnNi(NA) (NA = Nicotinic acid) MOF nanomaterials with molar ratios of 3:1; 1:1; and 1:3 are deployed as sensing materials for detection of NH3, HCHO and C2H5OH vapours at room temperature. These metal-organic frameworks (MOFs) were synthesized in 3:1 methanol and water solvents at 130 degrees C by solvothermal method. Several characterization techniques, like XRD, FT-IR, SEM, EDS, elemental analysis, TGA, and XPS, are used for structural illustration. Zn/Ni bimetallic MOFs exhibited smaller particle sizes and superior surface areas compared with Zn(NA) and Ni(NA) monometallic MOFs. ZnNi(NA)-1:1 showed a microporous nature, while ZnNi(NA)-3:1, ZnNi(NA)-1:3 and Zn(NA) are mesoporous nature. All the materials exhibited good thermal stability up to 450 degrees C temperature. The sensor-based on porous ZnNi(NA)-1:1 nanomaterial (approximate to 2.4 nm) exhibits the best sensing performance towards ammonia at 50 ppm concentration. The ZnNi(NA)-1:1 material showed more response (R-a/R-g = 291) compared to the monometallic compounds Ni(NA) (R-a/R-g = 119) and Zn (NA) (R-a/R-g = 64). All sensors have good reproducibility and excellent long-term stability.

Three nanodisc ZnO@MOFs, ZnO@ZIF-8 (1), ZnO@NA (2) and ZnO@INA (3) with structural building units 2-methylimidazole, nicotinic acid and isotonic acid are synthesized. These are fabricated and deployed as an advanced chemical capacitive sensors to detect formaldehyde and ammonia (NH3) at room temperature. These composite materials are characterized by Fourier transform infrared (FTIR) spectroscopy, powder X-ray diffraction (PXRD) spectra, scanning electron microscope (SEM) analysis, energy-dispersive X-ray spectroscopy (EDS), differential thermal analysis (DTA) and Brunauer–Emmett–Teller (BET) analysis. TGA studies suggest that these MOFs are stable up to 400 to 450 °C temperature. ZnO@ZIF-8 detected ammonia, formaldehyde, acetone and ethanol, while ZnO@NA and ZnO@INA detected ammonia and formaldehyde gases from 5 to 100 ppm range. ZnO@ZIF-8 showed microporous behaviour, while ZnO@NA and ZnO@INA showed mesoporous behaviours. Sensing performances were carried out at 5, 10, 25, 50 and 100 ppm concentrations of ammonia, acetone, formaldehyde, toluene, xylene and ethanol.

Chronic stable angina (CSA) is an incapacitating disorder. The pain can hinder the routine chores of an individual and significantly impact one’s quality of life (QoL). However, the good news is that this can be treated and the QoL can be improved. The key to apt management lies in the accurate early diagnosis of this condition, followed by a detailed evaluation and accordingly planned management, which should be regularly revised and be backed by an adequate follow-up. OPTA-OPtimal Treatment for chronic stable Angina-is an educational initiative to assist the clinicians in India with screening and diagnostic tools, strengthened by updated guideline-directed management to ensure satisfactory patient outcomes. OPTA aims to improve clinical outcomes by providing optimized pharmacotherapy for patients with stable angina. This expert consensus document intends to provide information for better understanding of the condition by clinicians and to ensure an early, accurate diagnosis, followed by optimal management of angina. For better clinical and practical understanding of Indian clinical scenario, the most commonly encountered patient profiles are briefly described here. These inputs and an extensive literature review were blended to develop the recommendations for clinicians across the country. An attempt is made to include clinical recommendations that meet the needs of the majority of patients in most circumstances in the Indian scenario. However, the ultimate judgment regarding individual case management should be based on clinician’s discretion. This expert consensus document is not a substitute for textbooks and/or a clinical judgment.

A series of dinuclear Zn(II) complexes [Zn-2 (L-1) (CH3OH)(2)(SCN) ((AOKI), [Zn-2 (O) (CH3OH)(2)(N-3)(2)](2) and [Zn-2 (L-1) (Cl)(2)(CH3OH)]center dot CH3OH (3) have been synthesized by the reaction of compartmental Schiff base ligand (H2L1) [N,N'-Bis(3-ethoxysalicylidenimino)-1,3-diaminopropane] with Zn(OAc)(2).2H(2)O in presence of coligand like KSCN, NaN3 and NaCl respectively. X-ray diffraction analysis revealed that all the complexes are neutral and possess a 4-membered Znz (mu(2)-O)(2) ring fastened by the unified coordination action of a doubly deprotonated ligand. In addition, solid state structure of the complexes display extensive intermolecular interaction which has been supported theoretically by Hirshfeld surface analysis with 2D Fingerprint plots. The synthesized Zn(II) metal complexes observed enhancement of luminescence emission compared to the parent Schiff base due to emanating ligand based intraligand (pi ->pi*) fluorescence. Additionally, Zn(II) metal complexes exhibited considerable antimicrobial potency against some important Gram +ve and Gram -ve bacteria. (C) 2017 Elsevier B.V. All rights reserved.

INTRODUCTION AND AIMS: Cardiovascular disease, mostly coronary artery disease (CAD), remains an important cause of morbidity and mortality in patients with end stage renal disease (ESRD).There are very few studies that assessed the prevalence of coronary artery disease (CAD) at the time of initiation of hemodialysis (HD).The present study was aimed to assess the prevalence of CAD in End stage renal disease (ESRD) patients at the time of initiation of HD and the risk factors for CAD in this population.METHODS: This was a single center retrospective study and included ESRD patients who underwent Coronary Angiography (CAG) at the time of initiation of HD.Inclusion criteria were age >18 years and those who were subjected to CAG within two weeks of initiation of HD.According to the findings on CAG, patients were divided in to No CAD and CAD groups.Clinical and laboratory parameters between these two groups were analyzed.RESULTS: 97 patients were included in the study based on the inclusion criteria.44 (45%) patients were diagnosed with CAD.Patients who developed CAD were younger compared to no CAD group (50.7þ10 vs 55.8þ9.3 years; P¼ 0.01).Majority of them were males.Diabetic nephropathy (DN) was associated with increased risk of CAD 60% vs 40%, P¼ 0.007).History of Smoking, high hsCRP, low total cholesterol and low HDL were associated with significantly increased risk of CAD.Gender, symptoms of CAD, Serum LDL, VLDL and Triglycerides were not associated with increased risk of CAD.Neither Calcium (Ca), phosphorous (PO 4 ) nor Ca x PO 4 products were associated with an increased risk of CAD.Resting ECG abnormalities had no significance in predicting CKD (32% in CAD and 19% in No CAD group P¼NS).Echocardiography showed regional wall motion abnormalities/Global hypokinesia in 18% patients of CAD group and 3.8% patients of No CAD group (P¼ 0.03).Single vessel, double vessel and triple vessel disease was documented in 17 (38%), 13 (29.5%)and 14 (32.5%)patients respectively, and the most common vessel involved was the left anterior descending artery.CONCLUSIONS: At the initiation of HD in ESRD patients, CAD was seen in almost half of the patients.DN was a significant risk factor for CAD.Other risk factors for CAD include smoking, low cholesterol, low HDL levels and high hsCRP levels.Typical symptoms of CAD, Serum VLDL, Triglycerides, LDL, resting ECG changes and gender were not associated with increased risk of CAD.As prevalence of CAD is very high, screening for CAD should be considered in all the patients at the time of initiation of HD.However the optimal screening tool should be defined by comparing various noninvasive tools with CAG.

A series of lithium phosphate glass-ceramics dispersed with ferroelectric BaTiO3 nanocrystals were synthesized by a high energy ball milling technique in view of the fact that this technique is being successfully used to produce nanocrystalline powders. X-ray diffraction (XRD) peaks corresponding to nanocrystalline phases such as BaTiO3, BaTiP2O3, TiO2, and Li4P2O7 are observed in all the LPBX glass-ceramic samples. The average crystallite sizes obtained from XRD traces are in good agreement with the values evaluated from SEM images. Raman spectra of BaTiO3 nanoparticles confirm their tetragonal structure with a non-regular octahedron formation which is due to the presence of hydroxyl related groups and Ba2+ vacancies. The bands observed in the Raman spectra of Li2O-P2O5:BaTiO3 glass-ceramic samples at 351, (151, 464, 448) and 1189 cm(-1) revealed the presence of major nanocrystalline phases such as Li4P2O7, BaTiO3 and TiO2 which are confirmed by XRD results. The bulk conductivity is the highest for the LPB15 glass-ceramic sample (sigma=1.414x10(-7) S/cm) at 303 K whereas the activation energy (E-a sigma=0.445 eV) and power exponent (s=0.352) are lowest among all the samples under investigation.

Tetrazoles are the class of heterocyclic polyazoles containing four nitrogen’s and a carbon atom. The chemistry of tetrazole has obtained extensive development, because tetrazoles and their derivatives have various potential applications in coordination chemistry as ligand due to their multiple Ndonar atoms and rich coordination modes [1]. Due to the high enthalpy of formation, tetrazole decomposition results in the liberation of two nitrogen molecules and a significant amount of energy. Tetrazole and their derivatives are reported to show various biological activities like antibacterial, antifungal, anticonvulsant, analgesic, anti-inflammatory, antitubercular, anticancer, antihypertensive and antidiabetic activities [2]. Tetrazoles are important synthons in synthetic organic chemistry and also used as pre-cursors of carbenes in flash vacuum pyrolysis [3]. The nitrogen rich ring system is used as explosives [4] and pharmaceuticals [5]. Besides, tetrazoles could be used as components of new generation filtering materials for the purification of biological Design, Synthesis, Single X-Ray Crystal Structure, DFT and Molecular Docking Studies of Novel Clip Type-Pyridyltetrazole Analogues

The reaction of cadmium(II) acetate salts with multisite coordinated compartmental Schiff base ligand N,N'-Bis(3-methoxysalicylidenimino)-1,3-diaminopropane (H2L1) in presence of co-lingand azido/thiocyanato afforded two new coordination polymers {[Cd-4(N-3)(4)(L-1)(2)]H2O}(n) (1), [Cd-4(SCN)(4)(L-1)(2)](n) (2). The obtained compounds, 1 and 2 are 1D and 2D coordination polymers respectively and they have been characterized by IR spectroscopy, UV-vis spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The variation in the extended forms of 1 and 2 is governed by the kind of co-ligands utilized in the reaction. The complete structural study reveals that, in both cases the fully deprotonated ligand [L-1](2-) has utilized all six potential coordination sites to hold a pair of Cd(II) ions. Moreover, [N-3](-) in 1 is coordinating to metal atom by both trans end-to-end (EE mu-1,3) and end-on (EO or mu-1,1) mode and [SCN](-) is showing only end-to-end (EE mu-1,3) coordination mode in 2. The photo luminescent properties and antimicrobial activities of the compounds 1 and 2 were investigated and discussed in details. Upon irradiation with UV light Cd(II) polymeric compounds 1-2 exhibit deep blue emissions of 448-451 nm subjected to dimethyl sulfoxide solution due to pi ->pi* intraligand fluorescence. Apart from, as a complementary revelation, intermolecular interactions with respect to percentages of hydrogen bonding in the crystal structures of two Cd(II) polymeric compounds were quantified by Hirshfeld surface and fingerprint plots analysis.

Glass samples with general formula NaCo1−x (VO) x PO4 (x = 0.1, 0.3, 0.5 and 0.7) are synthesized via a simple melt quenching method followed by high-energy ball milling for 30 h to form the homogeneous nanoscaled glass powders. DTA traces of all the glass and glass–ceramic samples indicated exothermic processes confirming selective crystallization induced in the glass network. The formation of major crystalline phase [sodium cobalt pyrophosphate (Na2CoP2O7)] with an ordered layered structure was monitored by X-ray diffraction and the same was justified by SEM images. Structural illustration of major crystalline Na2CoP2O7 phase offered more intra-layer Co–Co distance (7.12 Å) than inter-layer Co–Co distance (5.37 Å) which facilitates two-dimensional Na-ion diffusion pathways to achieve the fast intercalation and de-intercalation phenomenon along the a and c directions. The ionic conductivity was monitored by Impedance analysis and achieved to be highest (6.41 × 10−7 S cm−1) for the glass–ceramic cathode x = 0.3, NaCo1−x (VO) x PO4. The initial discharge capacity for the highest conducting NaCo0.7(VO)0.3PO4 cathode is obtained as 93 mA h g−1 in 0.1 C and had 65% capacity retention even at high rate 10 C.

A novel Schiff’s base derivatives were synthesized from some substituted Indole-3-carbaldehyde with substituted 2-aminothiazole. Which was 2-amino Thiazole synthesized by substituted phencyl bromide and thiaourea. All the synthesized compounds were confirmed their structures by elemental analysis, 1H NMR, 13C NMR, Mass spectral data and also studied their biological activity.

Global climate awareness is an important prerequisite for the benefit of the living species. A balance of the green house gases would make the terrestrial climate friendly and problem free. In this context ground based spectroscopic measurement of atmospheric gases play a major role .Nitrogen oxides present in the atmosphere react with water leading to acid rains. Atmospheric photo chemistry induces a complicated mechanism between Nitrogen oxides which impact the Ozone abundance. Detection of environmental gases by optical methods have proved to be the fastest and reliable detection techniques and Cavity Ring Down Spectroscopy in particular has proved to meet the requirements of being non invasive , portable, instantaneous and precise without interference with other species. It can detect weak absorptions as well as diluted species. The use of high reflectivity mirrors of the order of 99.99% enables the increase in effective path lengths of the light within the cavity and hence contribute to ultra high sensitivities. The purpose of this paper is to emphasis on Nitrogen Di oxide ,an important green house gas. Theoretical simulations are performed for NO2 at two different wavelengths(447 nm and 532 nm) based on the technique of Cavity ring down spectroscopy(CRDS). The empty cavity ring down time constant τ0 and the concentration dependant ring down time constant τ are obtained through simulations. The analysis is done for increasing cavity lengths from 40 cm to 90 cm at 447 nm and 532 nm. The results have shown that the time constant difference (τ0 τ) increases with gas concentration and is unique at each wavelength due to the dependence on absorption cross-section.