Singlet and Triplet Excited-State Dynamics of 3,7-Bis(arylethynyl)phenothiazines: Intramolecular Charge Transfer and Reverse Intersystem Crossing

2020 ◽  
Vol 124 (33) ◽  
pp. 17864-17878
Author(s):  
Madhurima Poddar ◽  
Alessio Cesaretti ◽  
Elena Ferraguzzi ◽  
Benedetta Carlotti ◽  
Rajneesh Misra
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Intersystem Crossing ◽  
Triplet Excited State ◽  
Excited State Dynamics

Solvent sensitive intramolecular charge transfer dynamics in the excited states of 4-N,N-dimethylamino-4′-nitrobiphenyl

2016 ◽  
Vol 18 (11) ◽  
pp. 7661-7671 ◽  
Author(s):  
Rajib Ghosh ◽  
Amitabha Nandi ◽  
Dipak K. Palit
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Triplet State ◽  
Excited States ◽  
Intramolecular Charge Transfer ◽  
Intersystem Crossing ◽  
Polar Solvents ◽  
Excited State Dynamics ◽  
Nonpolar Solvents ◽  
Charge Transfer Dynamics

Solvent sensitive excited state dynamics of DNBP is explored. In polar solvents, the ultrafast barrierless TICT process is the major relaxation pathway, whereas, in nonpolar solvents the excited state undergoes the PICT process, followed by efficient intersystem crossing to the triplet state.

Ultrafast excited state dynamics of fucoxanthin: excitation energy dependent intramolecular charge transfer dynamics

2011 ◽  
Vol 13 (22) ◽  
pp. 10762 ◽  
Author(s):  
Daisuke Kosumi ◽  
Toshiyuki Kusumoto ◽  
Ritsuko Fujii ◽  
Mitsuru Sugisaki ◽  
Yoshiro Iinuma ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Excitation Energy ◽  
Intramolecular Charge Transfer ◽  
Excited State Dynamics ◽  
Charge Transfer Dynamics ◽  
Energy Dependent

scholarly journals Guidelines for Tuning the Excited State Hückel-Baird Hybrid Aromatic Character of Pro-Aromatic Quinoidal Compounds

2020 ◽  
Author(s):  
Sílvia Escayola ◽  
Claire Tonnelé ◽  
Eduard Matito ◽  
Albert Poater ◽  
Henrik Ottosson ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Organic Compounds ◽  
Intramolecular Charge Transfer ◽  
Triplet Excited State ◽  
Computational Tools ◽  
Future Studies ◽  
Aromatic Character ◽  
Wide Range ◽  
New Energy

<p>The present study aims to provide a solid ground for the identification, characterization and controlled design of pro-aromatic quinoidal organic compounds holding conjugated rings with Hückel and/or Baird (singlet and triplet) excited state aromatic character, and expects to become a reference work for future studies on Baird-aromaticity. Concretely, we explore a wide range of compounds with a central conjugated ring of different sizes and symmetric exocyclic substitutions. We employ a combination of different computational tools and we also introduce a new energy-based approach for the quantification of the Baird-aromatic character. </p> <p> </p> The key findings of this study indicate that Baird aromaticity is achieved in pro-aromatic quinoidal compounds having small anionic rings or in electron deficient rings with the proper exocyclic substitution. Low-lying states of these systems show very strong hole/electron overlaps, implying that their aromaticity cannot be related to intramolecular charge transfer.

scholarly journals Guidelines for Tuning the Excited State Hückel-Baird Hybrid Aromatic Character of Pro-Aromatic Quinoidal Compounds

2020 ◽  
Author(s):  
Sílvia Escayola ◽  
Claire Tonnelé ◽  
Eduard Matito ◽  
Albert Poater ◽  
Henrik Ottosson ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Organic Compounds ◽  
Intramolecular Charge Transfer ◽  
Triplet Excited State ◽  
Computational Tools ◽  
Future Studies ◽  
Aromatic Character ◽  
Wide Range ◽  
New Energy

<p>The present study aims to provide a solid ground for the identification, characterization and controlled design of pro-aromatic quinoidal organic compounds holding conjugated rings with Hückel and/or Baird (singlet and triplet) excited state aromatic character, and expects to become a reference work for future studies on Baird-aromaticity. Concretely, we explore a wide range of compounds with a central conjugated ring of different sizes and symmetric exocyclic substitutions. We employ a combination of different computational tools and we also introduce a new energy-based approach for the quantification of the Baird-aromatic character. </p> <p> </p> The key findings of this study indicate that Baird aromaticity is achieved in pro-aromatic quinoidal compounds having small anionic rings or in electron deficient rings with the proper exocyclic substitution. Low-lying states of these systems show very strong hole/electron overlaps, implying that their aromaticity cannot be related to intramolecular charge transfer.

Spin–orbit charge transfer intersystem crossing in perylenemonoimide–phenothiazine compact electron donor–acceptor dyads

2018 ◽  
Vol 54 (87) ◽  
pp. 12329-12332 ◽  
Author(s):  
Yingjie Zhao ◽  
Ruomeng Duan ◽  
Jianzhang Zhao ◽  
Chen Li
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Electron Donor ◽  
Intersystem Crossing ◽  
Spin Orbit ◽  
Triplet Excited State ◽  
Donor Acceptor ◽  
State Production

Efficient triplet excited state production (57%) was observed for perylenemonoimide–phenothiazine compact electron donor–acceptor dyads based on spin–orbit charge transfer ISC.

scholarly journals Excited State Dynamics of Cold Protonated Cytosine Tautomers: Characterization of Charge Transfer, Intersystem Crossing, and Internal Conversion Processes

2017 ◽  
Vol 121 (34) ◽  
pp. 6429-6439 ◽  
Author(s):  
Michel Broquier ◽  
Satchin Soorkia ◽  
Gustavo Pino ◽  
Claude Dedonder-Lardeux ◽  
Christophe Jouvet ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Internal Conversion ◽  
Intersystem Crossing ◽  
Excited State Dynamics ◽  
Protonated Cytosine
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