𝔖 Bobbio Scriptorium
✦   LIBER   ✦

S1 absorption of chlorophyll-a in the red region

✍ Scribed by D. Leupold; J. Ehlert; S. Oberländer; B. Wiesner

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
470 KB
Volume
100
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

To clear up controversial results of excited-singlet (St) absorption of monomeric chlorophyll-a solutions in the red spectral range, non-linear absorption measurements were performed at h = 670 nm and evaluated in andytic and mmterical terms. A large St absorption cross section has been confirmed at 670 nm (OS, (670) = 0.71 ~~~(670) and excited-sinslet absorp- tion underlined as the cduse of the anomalous short-wave emission of the Chl-a laser. The St absorption cross sections for Chl-a/dioxan in the range 800-870 nm are given. * At excitation with nanosecond pulses of identical power density a 25 times smaller fluorescent quantum yield was observed for X,,, = 455 nm than for &.c = 655 nm ] 161; see also a note in ref. 171. 1315. A.W.H. blau and hl. Puzrt, Photocbem. Photobiol. 25 (I 977) 601. R. Jafmke and D. Leupold, Studin Biophys. 86 (1981) El.

📜 SIMILAR VOLUMES

The S1 and T1 spectra of chlorophyll-a i
The S1 and T1 spectra of chlorophyll-a in the visible region and an S1-bypassing relaxation from two-photon stepwise excited states
✍ D. Leupold; H. Stiel; J. Sepiol 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 380 KB

Differential optical density spectra of excited chlorophyll-a (chl-a) in dioxane were measured between 475 and 630 nm by a 337 nm excite-and-probe beam method with variable delay. Determination of the quantitative S, and T, absorption cross sections u(A) is based on additional measurements at 670 nm

The absorption spectrum of chlorophyll a
The absorption spectrum of chlorophyll a and the chlorophyll/dioxane and chlorophyll/benzoquinone interactions
✍ Joseph Le Brech; Roger M. Leblanc; Adel F. Antippa 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 736 KB

A molecular orbital calculation, using the "free-electron-network" method, is reported for the absorption spcctrum of chlorophyll a and the complexes chlorophyU/p-dioxane and chlorophyll/p-benzoquinone. For chlorophyil a, our results are in good agreement with experiment and are substantially the s

The Phosphorescence Excitation Spectrum
The Phosphorescence Excitation Spectrum of Jet-Cooled Xanthione in the Region of the T1←S0 and S1←S0 Absorption Transitions
✍ R.P Brint; W.G Doherty; A.A Ruth 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 192 KB

The 3 A 2 (nπ \* ) → 1 A 1 X (T 1 → S 0 ) phosphorescence excitation spectrum of jet-cooled xanthione was investigated in the region 14 920-17 600 cm -1 . The structure observed is shown to be due to the T 1 ← S 0 absorption and an assignment in terms of the vibronic structure of that band is propos

Fluorescence quantum yields of S1, benze
Fluorescence quantum yields of S1, benzene in the channel 3 region
✍ Minoru Sumitani; Desmond O'Connor; Yoshihiro Takagi; Nobuaki Nakashima; Keiji Ka 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 454 KB

llir rscit:ltiotl solir~c ettiploycd it1 this study lus hCI1 ilescrihcd it1 detail rccctltly 161 illlli Only it brief description will 1112 givctt lwrc. Tunable W lxcr light V0hI1nc 97. nu1nbcr 6 CHEWGiL PHYSKS LETTERS 3 Ju1rz 19s

Chlorophyll-a excited singlet state abso
Chlorophyll-a excited singlet state absorption measured in the picosecond time regime
✍ John F. Shepanski; Robert W. Anderson Jr. 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 794 KB

The uzmstent absorbance of lo-' hi chlorophyll-a tn pyrxhne is obsened 10 and 300 ps aiter e\CltxtIon by a 7 ps, 355 nm pulse The t\%o states prtmanl) responstble for the observed s1g~11 are the ground and first excited smpler state Esttmzrcs oi the excited-state population ~2 computed and used IO c