Microsecond 3MLCT excited state lifetimes in bis-tridentate Ru(ii)-complexes: significant reductions of non-radiative rate constants

2017 ◽  
Vol 46 (39) ◽  
pp. 13314-13321 ◽  
Author(s):  
Maria Abrahamsson ◽  
Hans-Christian Becker ◽  
Leif Hammarström
Keyword(s):  
Excited State ◽  
Rate Constants ◽  
Octahedral Structure ◽  
Radiative Rate ◽  
Excited State Lifetimes

A close to octahedral structure and an unusually small singlet–triplet mixing result in microsecond 3MLCT excited state lifetimes for this class of tridentate Ru(ii)-complexes.

INTERSYSTEM CROSSING OF THE ELECTRONICALLY EXCITED DIDEUTEROETHYLENE MOLECULES FORMED IN BENZENE PHOTOSENSITIZATION

1966 ◽  
Vol 44 (18) ◽  
pp. 2173-2180 ◽  
Author(s):  
Terumi Terao ◽  
Shun-Ichi Hirokami ◽  
Shin Sato ◽  
R. J. Cvetanović
Keyword(s):  
Excited State ◽  
Experimental Evidence ◽  
Rate Constants ◽  
Intersystem Crossing ◽  
Molecular Decomposition ◽  
Electronically Excited

Experimental evidence is presented for a rapidly occurring intersystem crossing of the electronically excited dideuteroethylene molecules initially formed in the benzene-photosensitized reaction at 2 537 Å and 25 °C to another excited state which is responsible for the internal H-atom scrambling. The mechanism is entirely analogous to that previously postulated for the photoexcited states sensitized by Hg(3P1) atoms but the rate constants for intersystem crossing and molecular decomposition are drastically decreased as a result of the smaller amount of energy available for the excitation.

Ultrafast Spectroscopy of Arylchlorodiazirines: Hammett Correlations of Excited State Lifetimes

2009 ◽  
Vol 131 (46) ◽  
pp. 16652-16653 ◽  
Author(s):  
Yunlong Zhang ◽  
Lei Wang ◽  
Robert A. Moss ◽  
Matthew S. Platz
Keyword(s):  
Excited State ◽  
Ultrafast Spectroscopy ◽  
Excited State Lifetimes

Steric Effects in the Electronic Spectra of the 3,5-Diarylaminobenzene Derivatives

1986 ◽  
Vol 41 (11) ◽  
pp. 1311-1314 ◽  
Author(s):  
A. Balter ◽  
W. Nowak ◽  
P. Milart ◽  
J. Sepioł
Keyword(s):  
Excited State ◽  
Electronic Spectra ◽  
Fluorescence Properties ◽  
Steric Effects ◽  
Quantum Yields ◽  
Spectroscopic Behaviour ◽  
Fluorescence Quantum Yields ◽  
Excited State Lifetimes ◽  
Methyl Phenyl

Absorption and fluorescence properties, excited state lifetimes and fluorescence quantum yields were determined for a series of 3,5-diarylaminobenzene derivatives in solvents of different polarities. The role of the nitrile, methyl, phenyl and naphthyl substituents is discussed. Especially the steric effects on the spectroscopic behaviour of the investigated molecules are studied.

scholarly journals Mono- Versus Bicyclic Carbene Metal Amide Photoemitters: Which Design Leads to Best Performance?

2020 ◽  
Author(s):  
Florian Chotard ◽  
Vasily Sivchik ◽  
Mikko Linnolahti ◽  
Manfred Bochmann ◽  
Alexander Romanov
Keyword(s):  
Excited State ◽  
State Energy ◽  
Conformational Flexibility ◽  
Quantum Yields ◽  
Carbene Ligands ◽  
Lumo Energy ◽  
Excited State Energy ◽  
Excited State Lifetimes

New luminescent “carbene-metal-amide” (CMA) Cu, Ag and Au complexes based on monocyclic (C6) or bicyclic six-ring (BIC6) cyclic (alkyl)(amino)carbene ligands illustrates the effects of LUMO energy stabilization, conformational flexibility and excited state energy on the photoemission properties, leading to near-quantitative quantum yields, short excited state lifetimes Cu > Au > Ag down to 0.5 µs and high radiative rates of 10<sup>6</sup> s<sup>–1</sup>.

Direct measurements of excited-state lifetimes in Mg, Ca, and Sr†

1977 ◽  
Vol 67 (4) ◽  
pp. 488 ◽  
Author(s):  
M. D. Havey ◽  
L. C. Balling ◽  
J. J. Wright
Keyword(s):  
Excited State ◽  
Direct Measurements ◽  
Excited State Lifetimes

Excited state lifetimes and appearance potentials of benzene dimer and trimer

1989 ◽  
Vol 91 (11) ◽  
pp. 6743-6751 ◽  
Author(s):  
Hisanori Shinohara ◽  
Nobuyuki Nishi
Keyword(s):  
Excited State ◽  
Benzene Dimer ◽  
Excited State Lifetimes

scholarly journals Correction to “A Synthetically Tunable System To Control MLCT Excited-State Lifetimes and Spin States in Iron(II) Polypyridines”

2018 ◽  
Vol 140 (3) ◽  
pp. 1181-1182
Author(s):  
Steven M. Fatur ◽  
Samuel G. Shepard ◽  
Robert F. Higgins ◽  
Matthew P. Shores ◽  
Niels H. Damrauer
Keyword(s):  
Excited State ◽  
Spin States ◽  
Tunable System ◽  
Excited State Lifetimes
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