Dynamics of excited-state intramolecular proton transfer reactions in piroxicam. Role of triplet states

Dae Won Cho; Yong Hee Kim; Minjoong Yoon; Sae Chae Jeoung; Dongho Kim

doi:10.1016/0009-2614(94)00742-X

Dynamics of excited-state intramolecular proton transfer reactions in piroxicam. Role of triplet states

Dae Won Cho, Yong Hee Kim, Minjoong Yoon, Sae Chae Jeoung, Dongho Kim

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The picosecond time-resolved fluorescence and transient absorption behavior of piroxicam at room temperature are reported. The keto tautomer in the excited singlet state (¹K*) formed via the fast intramolecular proton transfer (≈ 20 ps) is observed. The short-lived (7.5 ns) triplet state of keto tauomer (³K*) is generated from ¹K^* in toluene whereas it is hardly observed in ethanol. Consequently, rapid reverse proton transfer takes place from ³K^* to the enol triplet state (³E^*.

Original language	English
Pages (from-to)	275-280
Number of pages	6
Journal	Chemical Physics Letters
Volume	226
Issue number	3-4
DOIs	https://doi.org/10.1016/0009-2614(94)00742-X
Publication status	Published - 1994 Aug 19

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

Access to Document

10.1016/0009-2614(94)00742-X

Cite this

@article{04bcdb834e7d4ab5901946c4c07ff154,

title = "Dynamics of excited-state intramolecular proton transfer reactions in piroxicam. Role of triplet states",

abstract = "The picosecond time-resolved fluorescence and transient absorption behavior of piroxicam at room temperature are reported. The keto tautomer in the excited singlet state (1K*) formed via the fast intramolecular proton transfer (≈ 20 ps) is observed. The short-lived (7.5 ns) triplet state of keto tauomer (3K*) is generated from 1K* in toluene whereas it is hardly observed in ethanol. Consequently, rapid reverse proton transfer takes place from 3K* to the enol triplet state (3E*.",

author = "Cho, {Dae Won} and Kim, {Yong Hee} and Minjoong Yoon and Jeoung, {Sae Chae} and Dongho Kim",

year = "1994",

month = aug,

day = "19",

doi = "10.1016/0009-2614(94)00742-X",

language = "English",

volume = "226",

pages = "275--280",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Dynamics of excited-state intramolecular proton transfer reactions in piroxicam. Role of triplet states

AU - Cho, Dae Won

AU - Kim, Yong Hee

AU - Yoon, Minjoong

AU - Jeoung, Sae Chae

AU - Kim, Dongho

PY - 1994/8/19

Y1 - 1994/8/19

N2 - The picosecond time-resolved fluorescence and transient absorption behavior of piroxicam at room temperature are reported. The keto tautomer in the excited singlet state (1K*) formed via the fast intramolecular proton transfer (≈ 20 ps) is observed. The short-lived (7.5 ns) triplet state of keto tauomer (3K*) is generated from 1K* in toluene whereas it is hardly observed in ethanol. Consequently, rapid reverse proton transfer takes place from 3K* to the enol triplet state (3E*.

AB - The picosecond time-resolved fluorescence and transient absorption behavior of piroxicam at room temperature are reported. The keto tautomer in the excited singlet state (1K*) formed via the fast intramolecular proton transfer (≈ 20 ps) is observed. The short-lived (7.5 ns) triplet state of keto tauomer (3K*) is generated from 1K* in toluene whereas it is hardly observed in ethanol. Consequently, rapid reverse proton transfer takes place from 3K* to the enol triplet state (3E*.

UR - http://www.scopus.com/inward/record.url?scp=0012505718&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0012505718&partnerID=8YFLogxK

U2 - 10.1016/0009-2614(94)00742-X

DO - 10.1016/0009-2614(94)00742-X

M3 - Article

AN - SCOPUS:0012505718

VL - 226

SP - 275

EP - 280

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 3-4

ER -

Dynamics of excited-state intramolecular proton transfer reactions in piroxicam. Role of triplet states

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this