The general pattern of chlorophyll photooxidation is considered. The conclusion is made that the reaction of photooxidation occurs exclusively via the chlorophyll triplet state.
Ligand effects on the triplet state of chlorophyll
โ Scribed by R.H. Clarke; S. Hotchandani; S.P. Jagannathan; R.M. Leblanc
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 348 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
Laser evcltation at 4579 and 514.5 nm of a frozen solution of chlorophyll a m n-oc~;mc products two ~IUOWS.C~~CC peak maxima at 2 K lhat may be assigned to IWO dlainct monomenc chlorophyll species Ucd~~rng zero-Geld fluorcsccncrdetected mxgetuz resorunce the triplet state properks of the IWO chlorophyll species may be aslgned to the monohgted and bdigated chlorophyll monomer m which w~~te.r serves as the &and coordmated to the magwsmm melal center.
๐ SIMILAR VOLUMES
Chlorophyll-b in glassy solution has a spin-polarized lowest triplet state at and above 7? K. Ths magnitude of the .).'\_, .: effect is different for MTHF and ethanol as soIvents, in contrast to what is found for the porphin free base. Chloro-\_-phyla-a does not exhibit spa-polar~ation under identi
Resonance Raman spectra of the lowest excited triplet state of chlorophyll a are obtained in benzene and in methanol by pumping at 660 nm in the Q, band and pmbing at 460 nm which is close to the absorption maximum of the T, state. Tbe spectrum observed in polar methanol differs significantly from t
By. mcnitoring the em&ion sp&.rum, yield,'an8 lifetime from 77 to 400ยฐK for betiophenone in po~y(c~oroixi-