Pope's College, is a general degree college located in Sawyerpuram, Thoothukudi district, Tamil Nadu. It was established in the year 1880. The college is affiliated with Manonmaniam Sundaranar University. This college offers different courses in arts, commerce and science..
The Transparent nonlinear optical benzo[d]isothiazol-3(2H)-one 1,1-dioxide pyridine‑2,6‑diamine silver 1 ion (BDIT32HO11DOP26DSI) crystal has been grown, and the single crystal XRD has authenticated the data for BDIT32HO11DOP26DSI crystalline material. The grown BDIT32HO11DOP26DSI crystalline sample was monoclinic with P21/n space group by single crystal XRD analysis. The BDIT32HO11DOP26DSI crystal is a negative photoconductivity class of material. The second-order nonlinear optics (NLO) for macro-scaled specimen was 2.05 times that of a KDP crystal and leads to 143.5 mV as phase matched effectiveness for optronic utilities; extension of opto-electronic use was implemented for frequency doubling as the second-order NLO is physics of frequency doubling and the third-order one is 3.14 μ-esu by Z‑scan. In addition, the reddish LED material based outcome of the BDIT32HO11DOP26DSI macro-crystal had the sensor sensitivity by 7
Herein we report the potential applications of green synthesized silver nanoparticles (Ag NPs) as an efficient photocatalyst, an antibacterial agent and a larvicidal agent. The nanoparticles were synthesized via green approach using Pergularia daemia leaf extract as a natural reducing and capping agent. The presence of phytochemicals responsible for larvicidal and antibacterial activity, as well as their role in nanoparticle formation, was analyzed using GC-MS. The biosynthesized Ag NPs were further characterized through XRD, UV-Vis spectroscopy, FTIR, and SEM analysis. The synthesized Ag NPs exhibited potent larvicidal activity against Aedes aegypti and Culex quinquefasciatus, with LC50 values of 4.17 ppm and 4.52 ppm, respectively. Histopathological analysis revealed severe tissue damage in treated larvae, particularly affecting the midgut, hindgut, muscles, and nerve ganglia. In antibacterial studies, the nanoparticles demonstrated strong activity against Pseudomonas aeruginosa and Escherichia coli, with an inhibition zone of 17 mm at a concentration of 150 ppm which is higher than the commercial material. Additionally, the Ag NPs exhibited high efficiency of 94
Mercury provoked cleavage of the spirolactam ring of a fissure-shaped electronically superior rhodamine derivative appended to a pyrene moiety through a triazole bridge-based fluorescent molecule, (E)-3 ',6 '-bis(ethylamino)-2 ',7 '-dimethyl-2-((2-((1-(pyren-2-ylmethyl)-1H-1,2,3-triazol-4-yl)methoxy)benzylidene)amino)spiro[isoindoline-1,9 '-xanthen]-3-one (L) has been reported in the present work. The straightforward, rapid, and affordable fluorescence probe was designed to initiate the process of identifying the sensitivity of a specific deadly Hg2+ ion. The L exhibits extremely sensitive and selective turn-on emission augmentation upon complexation with Hg2+ via the CHEF effect and restricting the PET process. In addition, the formation of a highly fluorescent spirolactum ring-open form that is dark pink makes the L a suitable "naked-eye" sensor for Hg2+. According to Job's plot, 1H NMR titration, and ESI-MS studies, the 1:1 binding mode of L.Hg2+ is confirmed. Using fluorescence titration, the detection limit for Hg2+ ions was determined to be 11.36 nM. DFT investigations were used to determine the coordination mechanism in the L.Hg2+ complex. In addition, the L has been utilized to detect Hg2+ ions in real samples. According to the results of the cytotoxicity and emission microscopic imaging investigations, L is non-cytotoxic and can be employed as a fluorescent imaging sensor for Hg2+ in PC3 cells.
A fluorescent probe based on cyclen-pyrene, named 2,2 '-(7,10-bis(pyren-1-ylmethyl)-1,4,7,10-tetraazacyclododecane-1,4-diyl)diacetic acid (L), was effectively developed for the sensitive and selective detection of Sn2+ in ethanol/HEPES buffer (5 mM, pH 7.2, 1,9 v/v) solutions. The probe L shows a strong preference for the Sn2+ ion in the presence of other biologically relevant metal ions. Upon binding with Sn2+, L undergoes the CHEF effect and suppresses the PET process, resulting in a significant turn-on emission enhancement. The detection limit for Sn2+ was 7.71 nM, which meets the WHO's permissible concentration for Sn2+ in drinking water. The recognition mechanism of the L.Sn2+ complex was verified through FT-IR analysis, 1H NMR titration, and DFT studies. Furthermore, ESI-MS spectral analysis confirmed a 1:1 binding stoichiometry. L has also been used to detect Sn2+ ions in real samples and to create a paper-based test kit for efficient monitoring of Sn2+ ions. Moreover, bioimaging studies demonstrated that L serves as a useful fluorescent marker for detecting Sn2+ in living cells and zebrafish.
