Photochemical Rearrangement of Chlorinated Dibenzo-p-dioxins. Regioselective Carbon–Oxygen Bond Homolysis from the Singlet Excited State, and Carbon–Chlorine Bond Homolysis from the Triplet Excited State

2006 ◽  
Vol 35 (4) ◽  
pp. 348-349 ◽  
Author(s):  
Takanori Kobayashi ◽  
Jun-ichi Shimada ◽  
Chieko Kitahara ◽  
Naoki Haga
Keyword(s):  
Excited State ◽  
Singlet Excited State ◽  
Triplet Excited State ◽  
Photochemical Rearrangement ◽  
Bond Homolysis ◽  
Chlorine Bond ◽  
Oxygen Bond

The unquenched triplet excited state of the fluorescent OFF/ON Bodipy-derived molecular probe based on photo-induced electron transfer

2016 ◽  
Vol 15 (11) ◽  
pp. 1358-1365 ◽  
Author(s):  
Zafar Mahmood ◽  
Jianzhang Zhao
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Triplet State ◽  
Molecular Probe ◽  
Singlet Excited State ◽  
Triplet Excited State ◽  
Photo Induced Electron Transfer

Different from the singlet excited state (fluorescence), the triplet state of the probes is not quenched by photo-induced electron transfer.

Preparation of Bodipy–ferrocene dyads and modulation of the singlet/triplet excited state of bodipy via electron transfer and triplet energy transfer

2016 ◽  
Vol 4 (14) ◽  
pp. 2843-2853 ◽  
Author(s):  
Xueyan Wu ◽  
Wenting Wu ◽  
Xiaoneng Cui ◽  
Jianzhang Zhao ◽  
Mingbo Wu
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Excited States ◽  
Singlet Excited State ◽  
Triplet Excited State ◽  
Triplet Energy ◽  
Triplet Excited States ◽  
Triplet Energy Transfer

Bodipy–ferrocene dyads were prepared for reversible electrochemical switching of the singlet excited state (fluorescence), as well as the triplet excited states of Bodipy.

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.

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

scholarly journals Triplet energies and excimer formation in meta - and para -linked carbazolebiphenyl matrix materials

2015 ◽  
Vol 373 (2044) ◽  
pp. 20140446 ◽  
Author(s):  
Sergey A. Bagnich ◽  
Alexander Rudnick ◽  
Pamela Schroegel ◽  
Peter Strohriegl ◽  
Anna Köhler
Keyword(s):  
Excited State ◽  
Triplet State ◽  
Spectroscopic Investigation ◽  
Triplet Excited State ◽  
Conjugation Length ◽  
Triplet Energy ◽  
Excimer Formation

We present a spectroscopic investigation on the effect of changing the position where carbazole is attached to biphenyl in carbazolebiphenyl (CBP) on the triplet state energies and the propensity to excimer formation. For this, two CBP derivatives have been prepared with the carbazole moieties attached at the ( para ) 4- and 4 ′ -positions ( p CBP) and at the ( meta ) 3- and 3 ′ -positions ( m CBP) of the biphenyls. These compounds are compared to analogous m CDBP and p CDBP, i.e. two highly twisted carbazoledimethylbiphenyls, which have a high triplet energy at about 3.0 eV and tend to form triplet excimers in a neat film. This torsion in the structure is associated with localization of the excited state onto the carbazole moieties. We find that in m CBP and p CBP, excimer formation is prevented by localization of the triplet excited state onto the central moiety. As conjugation can continue from the central biphenyls into the nitrogen of the carbazole in the para -connected p CBP, emission involves mainly the benzidine. By contrast, the meta -linkage in m CBP limits conjugation to the central biphenyl. The associated shorter conjugation length is the reason for the higher triplet energy of 2.8 eV in m CBP compared with the 2.65 eV in p CBP.

Investigation of the triplet excited state and application of cationic meso-tetra(cisplatin)porphyrins in antimicrobial photodynamic therapy

2021 ◽  
pp. 102459
Author(s):  
Dariane Clerici Jornada ◽  
Rafael de Queiroz Garcia ◽  
Carolina Hahn da Silveira ◽  
Lino Misoguti ◽  
Cleber Renato Mendonça ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Excited State ◽  
Antimicrobial Photodynamic Therapy ◽  
Triplet Excited State
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