Influence of chemical substitution and electronic effects on the triplet state kinetics of xanthene dyes

Literature Information

Publication Date
DOI 10.1039/A900853E
Impact Factor 3.676
Authors


View Original

Abstract

Intersystem crossing rate constants and triplet lifetimes of structurally related xanthene dyes in air-equilibrated ethylene glycol are presented. By using a new time-resolved laser-scanning-microscopy technique the results are obtained with high accuracy. The relationship between the triplet quantum yield and the molecular structure is investigated. Electron withdrawing substituents yield a decrease of the intersystem crossing rate constant. This result is obtained for all investigated amino-group substitution patterns of the xanthene dyes. The introduction of additional branching of the chromophoric system causes an enhancement of the intersystem crossing rate constant by more than a factor of 2. These results cannot be explained by the energy gap rule. The triplet lifetime is in the range of a few microseconds and increases with the relative molecular mass of the dye.

Related Literature

Design and 3D printing of a stainless steel reactor for continuous difluoromethylations using fluoroform

Tania Ciaglia, Eyke Slama, Matej Zadravec, Stefan Pfanner

2017-11-09 Paper

DOI: 10.1039/C7RE00176B

Kinetic evaluation of the hydroformylation of the post-metathesis product 7-tetradecene using a bulky phosphite-modified rhodium catalyst

Nicholas C. C. Breckwoldt, Neill J. Goosen, Hermanus C. M. Vosloo, Percy Van der Gryp

2019-01-25 Paper

DOI: 10.1039/C8RE00239H

A hierarchical approach to chemical reactor engineering: an application to micro packed bed reactors

Mauro Bracconi, Anthony G. Dixon, Matteo Maestri

2018-01-08 Paper

DOI: 10.1039/C7RE00195A

Scaling up of 3D printed and Ni/Al2O3 coated reactors for CO2 methanation

Lidia Protasova, Vesna Middelkoop, Nachiketa Ray, Michel Jouve, Alain Bengaouer

2019-06-10 Paper

DOI: 10.1039/C9RE00092E

Solid-supported cyanoborohydride cartridges for automation of reductive amination radiochemistry

Louis Allott, Chris Barnes, Diana Brickute, Sau Fung Jacob Leung, Eric O. Aboagye

2019-07-25 Communication

DOI: 10.1039/C9RE00226J

Front cover

Cover

DOI: 10.1039/C9RE90024A

Contents list

Front/Back Matter

DOI: 10.1039/C9RE90064K

You might also like

Compound Q&A

What is 3-Fluoro-2-methylbenzylamine (CAS: 771573-36-5)?

3-Fluoro-2-methylbenzylamine is an organic compound with the CAS number 771573-3...

771573-36-53-Fluoro-2-methylben...
Compound Q&A

Is Tert-butyl 2-(oxetan-3-ylidene)acetate (CAS: 1207175-03-8) safe?

Tert-butyl 2-(oxetan-3-ylidene)acetate is considered safe for its intended uses ...

1207175-03-8Tert-butyl 2-(oxetan...
Compound Q&A

What precautions should be taken when handling 4-Acetyl-2-fluorobenzonitrile (CAS: 214760-18-6)?

Proper personal protective equipment (PPE) such as gloves, goggles, and a lab co...

214760-18-64-Acetyl-2-fluoroben...
Compound Q&A

How is 2-Ethyl-4-methyl-1,3-thiazole (CAS: 15679-12-6) typically synthesized?

2-Ethyl-4-methyl-1,3-thiazole is commonly synthesized via the reaction of thiour...

15679-12-62-Ethyl-4-methyl-1,3...
Compound Q&A

How should 5',5''-([2,2'-Bithiophene]-5,5'-diyl)bis(([1,1':3',1''-terphenyl]-4,4''-dicarboxylic acid)) (CAS: 1227780-71-3) be stored?

This compound should be stored in a cool, dry place away from direct sunlight an...

1227780-71-35',5''''-([2,2'-Bith...
Compound Q&A

What regulatory guidelines apply to L-Lysine Acetate Salt (CAS: 52315-92-1)?

L-Lysine Acetate Salt (CAS: 52315-92-1) is subject to various regulatory guideli...

52315-92-1L-LYSINE ACETATE SAL...
Compound Q&A

Is 6-Fluoro-3-hydroxy-2-pyrazinecarboxamide (CAS: 259793-96-9) safe?

6-Fluoro-3-hydroxy-2-pyrazinecarboxamide (CAS: 259793-96-9) is generally conside...

259793-96-96-Fluoro-3-hydroxy-2...
Compound Q&A

What are the physical and chemical properties of 1,1'-Sulfonylbis(1H-imidazole) (CAS: 7189-69-7)?

1,1'-Sulfonylbis(1H-imidazole) is a crystalline solid with a molecular weight of...

7189-69-71,1'-Sulfonylbis(1H-...
Compound Q&A

What industries use 4-methyl-7-nitro-1H-indole-3-carbonitrile (CAS: 289483-82-5)?

4-Methyl-7-nitro-1H-indole-3-carbonitrile (CAS: 289483-82-5) is primarily used i...

289483-82-54-methyl-7-nitro-1H-...
Compound Q&A

How should waste containing 5-Bromo-3-indolyl-beta-galactoside (CAS: 97753-82-7) be handled?

Waste containing 5-Bromo-3-indolyl-beta-galactoside (CAS: 97753-82-7) should be ...

97753-82-75-Bromo-3-indolyl-be...

Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

Recommended Compounds

Recommended Suppliers

Disclaimer
This page provides academic journal information for reference and research purposes only. We are not affiliated with any journal publishers and do not handle publication submissions. For publication-related inquiries, please contact the respective journal publishers directly.
If you notice any inaccuracies in the information displayed, please contact us at support@chemtradehub.com. We will promptly review and address your concerns.