5736-88-9Relevant articles and documents
Tuning the SOCT-ISC of bodipy based photosentizers by introducing different electron donating groups and its application in triplet-triplet-annihilation upconversion
Liang, Hui,Sun, Shanshan,Zafar, Mahmood,Yuan, Zhanxiang,Dong, Yuye,Ji, Shaomin,Huo, Yanping,Li, Ming-De,Zhao, Jianzhang
, (2020)
To study the effect of electron-donating ability on spin orbit charge transfer intersystem crossing (SOCT-ISC) efficiency, a series of bodipy derivatives (BDP-O, BDP-2-MN, BDP-2-EN) linked with electron-donating groups with different electron-donor abilities were synthesized. For BDP-2-MN and BDP-2-EN, both compounds show a sharp charge transfer emission band at 630 nm, and the local excited (LE) emission in both compounds were completely quenched due to photo-induced electron transfer (PET). By femtosecond transient absorption measurement, the triplet state population in both compounds was confirmed to occur through charge recombination (1996 ps ~2307 ps) process after the photo-induced electron transfer upon photoexcitation of bodipy moiety. A long-lived triplet excited state was observed for both compounds (lifetimes: 37 ~ 42 μs) via nanosecond transient absorption. The BDP-2-MN and BDP-2-EN can act as the triplet photosensitizers without heavy elements for the application of triplet-triplet-annihilation upconversion (TTA-UC, ΦUC can reach 4.88%). In case of BDP-O molecule, no triplet signal was observed for this compound because of poor electronic coupling between donor and acceptor. Therefore, the triplet excited state properties of bodipy chromophore was successfully regulated by adjusting electronic strength of donor moiety and implement these photosensitizers in the application of TTA-UC.
Novel N-heterocyclic carbene cyclic palladium compound as well as preparation method and application thereof
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Paragraph 0027; 0031; 0034, (2021/06/26)
The invention discloses a novel N-heterocyclic carbene cyclic palladium compound as well as a preparation method and application thereof, and belongs to the technical field of organic catalysis. The novel N-heterocyclic carbene cyclic palladium compound is prepared by the following steps: heating, stirring and mixing N-(4-butoxybenzyl)-N-ethylethylamine, palladium chloride and an organic solvent in an inert gas atmosphere, then adding potassium carbonate, performing stirring and mixing, and finally adding 1-(2,6-diisopropyl phenyl)-3-butyl-brominated imidazole for reflux reaction; and after the reaction is finished, performing quenching with an acid solution, performing extracting to obtain a crude product, and performing column chromatography separation and purification to obtain the novel N-heterocyclic carbene cyclic palladium compound. The N-heterocyclic carbene cyclic palladium compound provided by the invention has high catalytic activity, can catalyze cross-coupling reactions between aryl chloride and aryl phenylboronic acid and between aryl chloride and secondary amine in a catalytic amount of 1 mol%, and can be used as a high-efficiency catalyst for the coupling reactions.
2-Aryl benzazole derived new class of anti-tubercular compounds: Endowed to eradicate mycobacterium tuberculosis in replicating and non-replicating forms
Datta, Dhrubajyoti,Debnath, Joy,Franzblau, Scott G.,Ghosh, Kalyan Sundar,Hari, Natarajan,Ma, Rui,Rana, Shiwani,Velappan, Anand Babu
, (2020/09/04)
The high mortality rate and the increasing prevalence of Mtb resistance are the major concerns for the Tuberculosis (TB) treatment in this century. To counteract the prevalence of Mtb resistance, we have synthesized 2-aryl benzazole based dual targeted molecules. Compound 9m and 9n were found to be equally active against replicating and non-replicating form of Mtb (MIC(MABA) 1.98 and 1.66 μg/ml; MIC(LORA) 2.06 and 1.59 μg/ml respectively). They arrested the cell division (replicating Mtb) by inhibiting the GTPase activity of FtsZ with IC50 values 45 and 64 μM respectively. They were also capable of kill Mtb in non-replicating form by inhibiting the biosynthesis of menaquinone which was substantiated by the MenG inhibition (IC50 = 11.62 and 7.49 μM respectively) followed by the Vit-K2 rescue study and ATP production assay.