scholarly journals Individual control of singlet lifetime and triplet yield in halogen-substituted coumarin derivatives

RSC Advances ◽  
2020 ◽  
Vol 10 (45) ◽  
pp. 27096-27102
Author(s):  
Katrin E. Oberhofer ◽  
Mikayel Musheghyan ◽  
Sebastian Wegscheider ◽  
Martin Wörle ◽  
Eleonora D. Iglev ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Photophysical Properties ◽  
Transient Absorption Spectroscopy ◽  
Coumarin Derivatives ◽  
Individual Control

The photophysical properties of three 3-diethylphosphonocoumarin derivatives are studied by transient absorption spectroscopy and DFT calculations.

scholarly journals Investigation of the Photophysical Properties of a Eu3+ Coordination Polymer Bearing an α-Nitrile Substituted β-Diketonate Ligand via Emission and Ultrafast Transient Absorption Spectroscopy

2015 ◽  
Vol 68 (9) ◽  
pp. 1392 ◽  
Author(s):  
Brodie L. Reid ◽  
Evan G. Moore ◽  
Brian W. Skelton ◽  
Mark I. Ogden ◽  
Massimiliano Massi
Keyword(s):  
Coordination Polymer ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Photophysical Properties ◽  
Transient Absorption Spectroscopy ◽  
Quantum Yields ◽  
Metal Centre ◽  
Antenna Effect ◽  
One Dimensional ◽  
Polymer Bearing

Reaction of the β-diketone ligand, 2-cyano-1,3-phenyl-1,3-propandione (LH), with hydrated EuCl3 in the presence of 1,10-phenanthroline (Phen), results in the crystallisation of a one-dimensional Eu3+ coordination polymer of formulation [Eu(Phen)(L)3]∞, formed by coordination of the nitrile group of an O,O′-bound ligand to a neighbouring metal centre. An investigation of the metal-centred emission of the polymer, both in the solid state and solution, revealed red emission characterised by relatively long-lived excited state lifetimes and high intrinsic quantum yields. However, analysis of the overall quantum yield and sensitisation efficiency reveals that ultrafast processes in the ligand potentially inhibit Eu3+ sensitisation. Further investigations into these processes using transient absorption spectroscopy suggest that substitution at the α-C position may significantly decrease sensitisation via the antenna effect.

Experimental and theoretical studies on fluvastatin primary photoproduct formation

2017 ◽  
Vol 19 (33) ◽  
pp. 21946-21954 ◽  
Author(s):  
Dorota Jarmużek ◽  
Tomasz Pedzinski ◽  
Marcin Hoffmann ◽  
Tomasz Siodła ◽  
Kinga Salus ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Theoretical Studies ◽  
Experimental And Theoretical Studies

On the basis of transient absorption spectroscopy and DFT calculations, mechanisms of fluvastatin primary photoproduct (FP1 and FP2) formation were proposed.

Triplet excited state of diiodoBOPHY derivatives: preparation, study of photophysical properties and application in triplet–triplet annihilation upconversion

2016 ◽  
Vol 4 (8) ◽  
pp. 1623-1632 ◽  
Author(s):  
Caishun Zhang ◽  
Jianzhang Zhao
Keyword(s):  
Excited State ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Photophysical Properties ◽  
Transient Absorption Spectroscopy ◽  
Triplet Excited State ◽  
Triplet Triplet Annihilation

A pyrrole-BF2-based chromophore (BOPHY) was used for the preparation of triplet photosensitizers and the photophysical properties were studied using transient absorption spectroscopy.

Hydrogen bonding tunes the early stage of hydrogen-atom abstracting reaction

2014 ◽  
Vol 16 (33) ◽  
pp. 17828-17834 ◽  
Author(s):  
Yang Yang ◽  
Lei Liu ◽  
Junsheng Chen ◽  
Keli Han
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Atom ◽  
Dft Calculations ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Early Stage ◽  
Reaction Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Td Dft

The spontaneous and collision-assisted hydrogen-atom abstracting reaction dynamics of triplet benzil are investigated through a combination of transient absorption spectroscopy with TD-DFT calculations.

scholarly journals Characterizing the Solvated Structure of Photoexcited [Os(terpy)2]2+ with X-ray Transient Absorption Spectroscopy and DFT Calculations

Molecules ◽  
2016 ◽  
Vol 21 (2) ◽  
pp. 235 ◽  
Author(s):  
Xiaoyi Zhang ◽  
Mátyás Pápai ◽  
Klaus Møller ◽  
Jianxin Zhang ◽  
Sophie Canton
Keyword(s):  
Dft Calculations ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
X Ray

Charge-Transfer Dynamics at Ag/Ni-MOF/Cu2O heterostructure in Photoelectrochemical NH3 production

2021 ◽  
Author(s):  
Ying Liu ◽  
Jianmin Lu ◽  
Qianxiao Zhang ◽  
Yajie Bai ◽  
Xuliang Pang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Yield Rate ◽  
Ultrafast Transient Absorption ◽  
Charge Transfer Dynamics ◽  
Ultrafast Transient Absorption Spectroscopy

Decoration of Ag-ultrathin Ni-MOF onside Cu2O was firstly fabricated. The charge-transfer dynamics at heterostructure was in-depth revealed by ultrafast transient absorption spectroscopy. NH3 yield rate (4.63 μg h-1 cm-2) with...

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