Visible-Light-Induced Oxygenation of Benzene by the Triplet Excited State of 2,3-Dichloro-5,6-dicyano-p-benzoquinone

2013 ◽  
Vol 135 (14) ◽  
pp. 5368-5371 ◽  
Author(s):  
Kei Ohkubo ◽  
Atsushi Fujimoto ◽  
Shunichi Fukuzumi
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Triplet Excited State

Extending the scope of the carbonyl facilitated triplet excited state towards visible light excitation

2018 ◽  
Vol 20 (28) ◽  
pp. 19120-19128 ◽  
Author(s):  
Shinaj K. Rajagopal ◽  
Nagaraj K. ◽  
Somadrita Deb ◽  
Vinayak Bhat ◽  
Devika Sasikumar ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Triplet State ◽  
Lewis Acid ◽  
Triplet Excited State ◽  
Light Excitation ◽  
Acid Catalyzed

A series of extended π-conjugated benzophenone analogs was synthesized through a facile Lewis-acid catalyzed Friedel–Crafts reaction in order to exploit the integral triplet state properties of benzophenone.

Synthesis and photophysical properties of ruthenium(ii) polyimine complexes decorated with flavin

2018 ◽  
Vol 20 (25) ◽  
pp. 17504-17516 ◽  
Author(s):  
Huimin Guo ◽  
Lijuan Zhu ◽  
Can Dang ◽  
Jianzhang Zhao ◽  
Bernhard Dick
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Light Absorption ◽  
Photophysical Properties ◽  
Triplet Excited State ◽  
Visible Light Absorption ◽  
First Time

Phosphorescent emission from a flavin localized triplet excited state (3IL) is observed for the first time in a flavin decorated tris(dipyridine) Ru(ii) complex with strong visible light absorption.

The singlet excited state of BODIPY promoted aerobic cross-dehydrogenative-coupling reactions under visible light

2015 ◽  
Vol 51 (56) ◽  
pp. 11256-11259 ◽  
Author(s):  
Xu-Zhe Wang ◽  
Qing-Yuan Meng ◽  
Jian-Ji Zhong ◽  
Xue-Wang Gao ◽  
Tao Lei ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Bond Activation ◽  
Coupling Reactions ◽  
Singlet Excited State ◽  
Triplet Excited State ◽  
Dehydrogenative Coupling ◽  
First Time

We disclose for the first time that the singlet excited state (1PS*) of BODIPY rather than triplet excited state (3PS*) can drive C–H bond activation to form C–C and C–P bonds smoothly upon irradiation by visible light.

Switching of the triplet excited state of rhodamine-C60 dyads

2014 ◽  
Vol 50 (98) ◽  
pp. 15627-15630 ◽  
Author(s):  
Fen Wang ◽  
Xiaoneng Cui ◽  
Zhangrong Lou ◽  
Jianzhang Zhao ◽  
Ming Bao ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Triplet State ◽  
Light Absorption ◽  
Triplet Excited State ◽  
Visible Light Absorption ◽  
State Production

Rhodamine was used as an acid-responsive moiety for switching of the triplet state production and visible light absorption of rhodamine-C60 dyads.

scholarly journals Broadband Visible Light-Absorbing [70]Fullerene-BODIPY-Triphenylamine Triad: Synthesis and Application as Heavy Atom-Free Organic Triplet Photosensitizer for Photooxidation

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1243
Author(s):  
San-E Zhu ◽  
Jian-Hui Zhang ◽  
Yu Gong ◽  
Li-Feng Dou ◽  
Li-Hua Mao ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Chemical Sensor ◽  
Heavy Atom ◽  
Visible Region ◽  
Intersystem Crossing ◽  
Triplet Excited State ◽  
Efficient Energy Transfer ◽  
Uv Visible ◽  
The Individual

A broadband visible light-absorbing [70]fullerene-BODIPY-triphenylamine triad (C70-B-T) has been synthesized and applied as a heavy atom-free organic triplet photosensitizer for photooxidation. By attaching two triphenylmethyl amine units (TPAs) to the π-core of BODIPY via ethynyl linkers, the absorption range of the antenna is extended to 700 nm with a peak at 600 nm. Thus, the absorption spectrum of C70-B-T almost covers the entire UV–visible region (270–700 nm). The photophysical processes are investigated by means of steady-state and transient spectroscopies. Upon photoexcitation at 339 nm, an efficient energy transfer (ET) from TPA to BODIPY occurs both in C70-B-T and B-T, resulting in the appearance of the BODIPY emission at 664 nm. Direct or indirect (via ET) excitation of the BODIPY-part of C70-B-T is followed by photoinduced ET from the antenna to C70, thus the singlet excited state of C70 (1C70*) is populated. Subsequently, the triplet excited state of C70 (3C70*) is produced via the intrinsic intersystem crossing of C70. The photooxidation ability of C70-B-T was studied using 1,5-dihydroxy naphthalene (DHN) as a chemical sensor. The photooxidation efficiency of C70-B-T is higher than that of the individual components of C70-1 and B-T, and even higher than that of methylene blue (MB). The photooxidation rate constant of C70-B-T is 1.47 and 1.51 times as that of C70-1 and MB, respectively. The results indicate that the C70-antenna systems can be used as another structure motif for a heavy atom-free organic triplet photosensitizer.

A fullerene-rhodamine B photosensitizer with pH-activated visible-light absorbance/fluorescence/photodynamic therapy

2018 ◽  
Vol 6 (18) ◽  
pp. 2778-2784 ◽  
Author(s):  
Qianyun Tang ◽  
Wanyue Xiao ◽  
Jiewei Li ◽  
Dapeng Chen ◽  
Yewei Zhang ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Excited State ◽  
Visible Light ◽  
Rhodamine B ◽  
Heavy Atom ◽  
Triplet Excited State ◽  
Turn On ◽  
State Generation ◽  
Fluorescence Turn On ◽  
Light Absorbance

A heavy-atom-free photosensitizer (C60-RB) with pH-activable visible-light absorbance enhancement, fluorescence turn-on and triplet excited state generation was designed for tumor bioimaging and photodynamic therapy.

scholarly journals Ultra long‐lived triplet excited state in water at room temperature: Insights on the molecular design of tridecafullerenes

2021 ◽  
Author(s):  
Javier Ramos-Soriano ◽  
Alfonso Pérez-Sánchez ◽  
Sergio Ramírez-Barroso ◽  
Beatriz M. Illescas ◽  
Khalid Azmani ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Molecular Design ◽  
Triplet Excited State
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