Phosphorescent rhenium-dipyrrinates: efficient photosensitizers for singlet oxygen generation
作者:Neha Manav、Praseetha E. Kesavan、Masatoshi Ishida、Shigeki Mori、Yuhsuke Yasutake、Susumu Fukatsu、Hiroyuki Furuta、Iti Gupta
DOI:10.1039/c8dt04540b
日期:——
longer triplet state lifetimes (τT = 9–29 μs). Also, a large Stokes shift (Δν = 5682–6957 cm—1) was witnessed for all the rhenium dipyrrinates. Triplet emission was reflected in the efficient singletoxygengeneration yields (ΦΔ ∼ 0.75–0.98) along with the distinct photo-stability. Density functional theory (DFT) calculations revealed that the electron density is spread over the dipyrrin unit in most complexes
Luminescent iridium(<scp>iii</scp>) dipyrrinato complexes: synthesis, X-ray structures, and DFT and photocytotoxicity studies of glycosylated derivatives
作者:Neha Manav、Mohsin Y. Lone、Md Kausar Raza、Jaydeepsinh Chavda、Shigeki Mori、Iti Gupta
DOI:10.1039/d1dt04218a
日期:——
significant charge distribution between dipyrrin ligands and Ir-cyclometalated units in all the molecules. X-ray crystal structures revealed an octahedral geometry of the Ir(III) center in the complex. The in vitro studies of the glycosylated Ir(III) complexes revealed strong photoluminescence with maximum Stokes shifts, and they showed significant photocytotoxicity in skin keratinocyte (HaCaT) and lung adenocarcinoma
合成了一系列发光的 Ir( III ) 联吡啶配合物,在联吡啶配体的 C-5 位具有各种芳香族发色团。Ir( III ) 双嘧啶配合物上不同发色团的存在改变了它们的光学性质,并在红色至近红外区域(680-900 nm)产生强烈的发射,具有巨大的斯托克斯位移(5910-7045 cm -1)。TD-DFT 研究表明,在所有分子中,双吡喃配体和 Ir 环金属化单元之间存在显着的电荷分布。X 射线晶体结构揭示了复合物中 Ir( III ) 中心的八面体几何形状。糖基化Ir ( III) 复合物显示出具有最大斯托克斯位移的强光致发光,并且它们在皮肤角质形成细胞 (HaCaT) 和肺腺癌细胞 (A549) 中显示出显着的光细胞毒性。糖基化 Ir( III ) 复合物的单线态氧产生量子产率在水中的 70-78% 范围内。曝光后估计的 IC 50值在 17 和 25 μM 之间,共聚焦显微镜显示糖基化的
Robust Zinc(II)porphyrin Catalyst for Visible Light Induced C–H Arylation of Heteroarenes
作者:Anu Janaagal、Sanyam、Anirban Mondal、Iti Gupta
DOI:10.1021/acs.joc.3c00385
日期:2023.7.7
Zinc(II)porphyrin catalyzed light induced C–H arylation of heteroarenes from anilines is discussed. The method is nontoxic and efficient, using only 0.5 mol % of porphyrin catalyst to produce bi(hetero)aryls in good yields. This work demonstrates the potential use of porphyrin photocatalysts as efficient and robust alternatives to organic dyes.
Carbazole Substituted BODIPYs: Synthesis, Computational, Electrochemical and DSSC Studies
作者:Praseetha E. Kesavan、Raghu Nath Behera、Shigeki Mori、Iti Gupta
DOI:10.1007/s10895-017-2152-9
日期:2017.11
p-anisyl substituted BODIPY dyes with a cyanoacetic acid anchoring group have been prepared and their spectral, electrochemical properties and photosensitizing potential in DSSC have been evaluated. X-ray structure of N-phenylcarbazole substituted BODIPY revealed lower torsion angle between BODIPY plane and carbazole plane, suggesting increased communication between the two units. DFT studies indicated
meso-N-Butylcarbazole substituted BODIPYs showed red shifted emission, large Stokes shifts and efficient energy transfer from the meso-carbazole unit to the BODIPY core.