✦ LIBER ✦

Photoexcited triplet ESR studies on water-soluble thiaporphyrins

✍ Scribed by T.K. Chandrashekar; Hans van Willigen

Book ID: 103034302
Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 284 KB
Volume: 198
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)90065-u

No coin nor oath required. For personal study only.

✦ Synopsis

Triplet state characteristics of monomer and dimer of two core modified thiaporphyrins (STPPS and S2TPPS) are reported. Introduction of heavy sulfur atom (s) into the porphyrin core does not alter the zero-field splitting parameters significantly and the ESP pattern remains the same as in analogous H2TPPS. This is possibly due to similarities in the structures of the porphyrin core of STPPS, S2TPPS and H2TPPS. However, there is a strong dimerization effect on the D value similar to those observed for dimerization of HzTPPS.

📜 SIMILAR VOLUMES

Photoexcited triplet ESR studies on thia

Photoexcited triplet ESR studies on thiaporphyrins and their protonated derivatives

✍ R.P. Pandian; T.K. Chandrashekar; Hans van Willigen 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 458 KB

The photoexcited triplet states of mono-and di-thi'aporphyrins and their protonated derivatives are investigated by ESR spectroscopy. A comparison of the magnitude of the zero-field splitting parameters (D and E) of neutral thiaporphyrins with H,TPP indicates no significant alterations in the triple

ESR study of the photoexcited triplet st

ESR study of the photoexcited triplet state of substituted 2-acetonaphthones

✍ D. Devapiriam; K. Rajasekaran; C. Gnanasekaran; R. Murugesan 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 301 KB

ESR and ENDOR study of photoexcited trip

ESR and ENDOR study of photoexcited triplets of cyano-substituted porphyrins

✍ van Willigen, Hans 📂 Article 📅 1983 🏛 American Institute of Physics 🌐 English ⚖ 678 KB

ESR study of photoexcited triplets of so

ESR study of photoexcited triplets of some tetra(4-sulfonatophenyl)porphyrin dimers

✍ T.K. Chandrashekar; Hans Van Willigen 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 469 KB

Tc1r~(l-sulfon~1ophcnyl)porphyrin (H,TPPS), and the mct;tlloporph~rinsZnTPPS and PdTPPS dimctir in ;~qusous solution. An ESR study has been made of the photocscited ~rrplrrs oi the [ZnTPPS12. [H2TPPS/Z~TPPS] and [HzTPPS/PdTPPS] dimers. It is found that there is n strong dimcrization effect on the va

Molecular dynamics studied by transient

Molecular dynamics studied by transient esr nutation spectroscopy of photoexcited triplet states: Chlorophyll a in liquid crystalline matrix

✍ Jürgen Fessmann; Norbert Rösch; Ernst Ohmes; Gerd Kothe 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 507 KB

Molecular order and dynamics of chlorophyll a triplets in liquid crystals are studied by transient ESR following pulsed laser excitation. The time evolution of the transverse magnetization is monitored at various static and microwave magnetic fields. Analysis ofthc ESR transients isachicved by emplo

Study on triplet-dye molecules under las

Study on triplet-dye molecules under laser excitation using ESR technique

✍ Yamashita, M.; Kashiwagi, H. 📂 Article 📅 1974 🏛 IEEE 🌐 English ⚖ 272 KB