نتایج جستجو برای: intramolecular chargeenergy transfer

تعداد نتایج: 301504  

2017
Andrei V. Smirnov George A. Kraus Jacob W. Petrich A. V. Smirnov

The excited-state intramolecular H atom transfer reaction occurring in hypericin and hypocrellin A is investigated by means of the fluorescence upconversion technique in a variety of solvents. Rising components of ∼10 ps, attributable to intramolecular H atom transfer, are clearly observed in the fluorescence upconversion traces of both hypericin and hypocrellin A. The amplitude of the rising c...

Journal: :Chemical science 2014
Xiao-Feng Yang Qian Huang Yaogang Zhong Zheng Li Hua Li Mark Lowry Jorge O Escobedo Robert M Strongin

Many studies have shown that glutathione (GSH) and cysteine (Cys) / homocysteine (Hcy) levels are interrelated in biological systems. To unravel the complicated biomedical mechanisms by which GSH and Cys/Hcy are involved in various disease states, probes that display distinct signals in response to GSH and Cys/Hcy are highly desirable. In this work, we report a rhodol thioester (1) that respond...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Qibing Zhou Steven E Rokita

Selective alkylation of a chosen sequence of DNA typically relies on ligand-directed delivery of a compound that expresses an intrinsic reactivity. A significant and biologically relevant enhancement in specificity is theoretically possible if such an intrinsic reactivity could be replaced by a latent activity induced solely by the target of interest, but examples of this are rare and not easil...

Journal: :Proceedings of the National Academy of Sciences 1991

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