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.

scholarly journals Solvent-Dependent Resonance Raman Excitation Profiles of 9,9'-Bianthryl

1999 ◽  
Vol 19 (1-4) ◽  
pp. 51-56
Author(s):  
Gregory D. Scholes ◽  
Thierry Fournier ◽  
David Phillips ◽  
Anthony W. Parker
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Ground State ◽  
Electronic Excitation ◽  
Electronic Absorption Spectra ◽  
Excited Electronic State ◽  
Resonance Raman ◽  
Initial State ◽  
Solvent Environment ◽  
Raman Excitation Profiles

Dynamics subsequent to the electronic excitation of 9,9′-bianthryl produce a polar emissive excited state for which the symmetry of the bichromophore is broken by a dynamic solvent stabilisation of one of the two, otherwise degenerate, charge transfer configurations which contribute to the excited electronic state. The initial state created upon excitation is examined here by analysis of ground state resonance Raman excitation profiles (REPs) and electronic absorption spectra in solvents of various polarities. The results suggest that the REPs are signalling electronic differences between the initially excited state in the various solvents. We suggest that this is related to the bianthryl excited state being responsive to the disordered solvent environment.

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.

Temperature dependence of photophysical properties of a dinuclear C^N-cyclometalated Pt(ii) complex with an intimate Pt–Pt contact. Zero-field splitting and sub-state decay rates of the lowest triplet

2018 ◽  
Vol 20 (38) ◽  
pp. 25096-25104 ◽  
Author(s):  
Joseph C. Deaton ◽  
Arnab Chakraborty ◽  
Rafal Czerwieniec ◽  
Hartmut Yersin ◽  
Felix N. Castellano
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Photophysical Properties ◽  
Decay Rates ◽  
Zero Field ◽  
Triplet Excited State ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Ligand Charge Transfer ◽  
Metal Metal

A dinuclear Pt(ii) complexes exhibits an unusually large zero field splitting in its metal–metal-to-ligand charge transfer triplet excited state.

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