Fast Energy Transfer of Charge−Transfer Triplet Excited State (3CT) of [Ru(bpy)3](PF6)2to Os2+at Short Distances in the Crystal

2000 ◽  
Vol 104 (22) ◽  
pp. 5176-5180 ◽  
Author(s):  
Minoru Tsushima ◽  
Noriaki Ikeda ◽  
Koichi Nozaki ◽  
Takeshi Ohno
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Charge Transfer ◽  
Triplet Excited State

scholarly journals Sensitization of ultra-long-range excited-state electron transfer by energy transfer in a polymerized film

2012 ◽  
Vol 109 (38) ◽  
pp. 15132-15135 ◽  
Author(s):  
Akitaka Ito ◽  
David J. Stewart ◽  
Zhen Fang ◽  
M. Kyle Brennaman ◽  
Thomas J. Meyer
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Charge Transfer ◽  
Long Range ◽  
Methyl Viologen ◽  
Polymer Network ◽  
Triplet Energy ◽  
Ligand Charge Transfer ◽  
Triplet Energy Transfer

Distance-dependent energy transfer occurs from the Metal-to-Ligand Charge Transfer (MLCT) excited state to an anthracene-acrylate derivative (Acr-An) incorporated into the polymer network of a semirigid poly(ethyleneglycol)dimethacrylate monolith. Following excitation, to Acr-An triplet energy transfer occurs followed by long-range, Acr-3An—Acr-An → Acr-An—Acr-3An, energy migration. With methyl viologen dication (MV2+) added as a trap, Acr-3An + MV2+ → Acr-An+ + MV+ electron transfer results in sensitized electron transfer quenching over a distance of approximately 90 Å.

Excited State Dynamics of Novel Diporphyrins with Dissimilar Cores

1999 ◽  
Vol 03 (01) ◽  
pp. 70-77 ◽  
Author(s):  
M. RAVIKUMAR ◽  
R. P. PANDIAN ◽  
T. K. CHANDRASHEKAR
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excitation Wavelength ◽  
Triplet Excited State ◽  
Lifetime Measurements ◽  
Time Resolved ◽  
Fluorescence Studies ◽  
Axial Ligation ◽  
Excitation Time ◽  
The Individual

The singlet and triplet excited state properties of two diporphyrins, H 2- H and Zn - H , are described. Steady state fluorescence studies indicate that the emission of the H 2- H diporphyrin is dependent on the excitation wavelength and is dominated by the emission of the individual constituent monomers at their respective excitation. Time-resolved studies show two lifetimes ascribable to the normal and thiaporphyrin subunits. However, the emission of the Zn - H diporphyrin is dominated by the thiaporphyrin subunit irrespective of the wavelength of excitation, suggesting an energy transfer from the Zn porphyrin subunit to the thiaporphyrin subunit. Lifetime measurements in toluene show two lifetimes due to open and folded conformations, while in DMF an additional component due to axial ligation is observed. The efficiency of energy transfer is moderately higher in DMF (72%) than in toluene (68%). Triplet ESR studies on the H 2- H dimer reveal a localized triplet with ZFS parameters and ESP pattern the same as for the individual monomers. On the other hand, triplet ESR of the Zn - H diporphyrin reveals triplet characteristics of the thiaporphyrin subunit, indicating an energy transfer in the triplet state.

Ultralong organic luminogens with color-tunability via intermolecular through-space charge-transfer characters

2020 ◽  
Vol 8 (33) ◽  
pp. 11603-11609
Author(s):  
Yanju Luo ◽  
Zhenguo Pang ◽  
Chuan Li ◽  
Kuan Chen ◽  
Xujun Zheng ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Space Charge ◽  
Triplet Excited State ◽  
Initial State ◽  
Color Tunable ◽  
Color Tunability

A feasible constructive strategy for color-tunable UOL materials is demonstrated by utilizing triplet excited state with an intermolecular through-space charge-transfer character as the initial state.

Electron-Phonon Coupling and CT-Character in the lowest Triplet Excited State of Anthracene EDA-Complex Crystals

1987 ◽  
Vol 42 (11) ◽  
pp. 1261-1265 ◽  
Author(s):  
S. Maier ◽  
H. Port
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Spectral Resolution ◽  
High Spectral Resolution ◽  
Phonon Coupling ◽  
Triplet Excited State ◽  
Electron Phonon Coupling ◽  
Donor Acceptor ◽  
Eda Complex ◽  
Complex Crystals

Photoexcitation spectra of triplet (T1← S0) zero-phonon lines and phonon sidebands in different anthracene electron donor-acceptor (EDA) complex crystals (A-PMDA, A-TCNB, A-TCPA) have been analyzed between 1.3 K and 50 K at high spectral resolution. From the electron-phonon coupling strength at T = 0 K values of the charge-transfer (CT) character in the range between 6% and 10% are calculated. The differences in these values are found to be correlated with the energetic positions of the triplet state, which are explained within the framework of the Mulliken theory.

Competitive Marcus-Type Electron Transfer and Energy Transfer from the Higher Triplet Excited State

2004 ◽  
Vol 108 (50) ◽  
pp. 10941-10948 ◽  
Author(s):  
Masanori Sakamoto ◽  
Xichen Cai ◽  
Michihiro Hara ◽  
Sachiko Tojo ◽  
Mamoru Fujitsuka ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Triplet Excited State

trans-4-Stilbenecarboxylatoalkylpentaamminecobalt(III) Perchlorates: Synthesis and Intramolecular Energy Transfer

1996 ◽  
Vol 61 (3) ◽  
pp. 342-354 ◽  
Author(s):  
Cyril Párkányi ◽  
Lois Shiow-Chyn Yeh Huang ◽  
Sung Gun Chu ◽  
Alfred T. Jeffries III
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Singlet State ◽  
Excitation Energy Transfer ◽  
Intramolecular Energy Transfer ◽  
Triplet Excited State ◽  
Excited Singlet ◽  
Fluorescence Studies ◽  
Methylene Groups ◽  
A Charge

Three homologs of trans-4-stilbenecarboxylic acid, viz., trans-4-stilbeneacetic acid (18), β-(trans-4-stilbene)propionic acid (19), and γ-(trans-4-stilbene)butyric acid (20) were synthesized and, together with the parent trans-4-stilbenecarboxylic acid, used to obtain the corresponding [ω-(trans-4-stilbene)carboxylatoalkylpentaamminecobalt(III) complexes, [(PhCH=CHC6H4(CH2)nCOO)Co(NH3)5]2+ (1-4), where n = 0, 1, 2, or 3. Fluorescence studies suggest that an intramolecular excitation energy transfer occurs from the first excited singlet state of the ligand to the metal giving rise to a charge-transfer triplet-excited state of the complex, based on the analogy with previous work on complex 1. The efficiency of the energy transfer seems to decrease with increasing number of the methylene groups in the ligand.

scholarly journals Orthogonally Aligned Cyclic BODIPY Arrays with Long-lived Triplet Excited States as Efficient Heavy-Atom-Free Photosensitizers

2021 ◽  
Author(s):  
Zhaoyang Zhu ◽  
Xue Zhang ◽  
Xing Guo ◽  
Qing-Hua Wu ◽  
Zhongxin Li ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Excited States ◽  
Heavy Atom ◽  
Triplet Excited State ◽  
Transfer Processes ◽  
Excited State Lifetimes ◽  
Triplet Excited States

Photosensitizers with long triplet excited state lifetimes are key to their efficient electron transfer or energy transfer processes. Herein, we report a novel class of cyclic trimeric BODIPY arrays which...

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