Rotational mobility and rate of photoisomerization of spin-labeled azobenzenes in glassy polystyrene

被引:7
|
作者
Bogdanov, Alexey V. [1 ]
Vorobiev, Andrey Kh. [1 ]
机构
[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia
关键词
CIS-TRANS ISOMERIZATION; LOCAL FREE-VOLUME; MOLECULAR MOBILITY; AZOCHROMOPHORIC LABELS; TEMPERATURE-DEPENDENCE; AMORPHOUS POLYMERS; QUANTUM YIELDS; AZO-COMPOUNDS; PROBE; PHOTOCHEMISTRY;
D O I
10.1016/j.cplett.2011.02.063
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The rate of photochemical isomerization of azobenzene derivatives dispersed in glassy polystyrene has been measured along with rotational mobility of reacting molecules. For this purpose bifunctional probe molecules carrying a paramagnetic nitroxide fragment and a photochromic azobenzene moiety were used. The kinetics of photoisomerization was followed by monitoring the change in the UV-Vis absorbance spectra. Rotational mobility was determined by numerical simulation of the ESR spectra. It has been shown that in the matrix of glassy polystyrene amplitudes of high-frequency angular displacements (quasi-librations) correlate with the rate of photochemical trans-cis isomerization. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:46 / 51
页数:6
相关论文
共 50 条
  • [41] ORIENTATION AND ROTATIONAL-DYNAMICS OF SPIN-LABELED MYOSIN HEADS - A COMPARISON OF VERTEBRATE STRIATED AND INSECT FLIGHT MUSCLES
    THOMAS, DD
    COOKE, R
    BARNETT, VA
    SOMMERVILLE, L
    BIOPHYSICAL JOURNAL, 1981, 33 (02) : A21 - A21
  • [42] Microsecond rotational dynamics of spin-labeled myosin regulatory light chain induced by relaxation and contraction of scallop muscle
    Roopnarine, O
    Szent-Györgyi, AG
    Thomas, DD
    BIOCHEMISTRY, 1998, 37 (41) : 14428 - 14436
  • [43] ROTATIONAL MOTION OF SPIN-LABELED MYOSIN HEADS DURING CONTRACTION - SATURATION TRANSFER ELECTRON-PARAMAGNETIC-RES
    BARNETT, VA
    THOMAS, DD
    BIOPHYSICAL JOURNAL, 1983, 41 (02) : A264 - A264
  • [44] MOBILITY OF THE SPIN-LABELED SIDE-CHAINS OF SOME NOVEL ANTIFOLATE INHIBITORS IN THEIR COMPLEXES WITH DIHYDROFOLATE-REDUCTASE
    BLAKLEY, RL
    PIPER, JR
    MAHARAJ, G
    APPLEMAN, JR
    DELCAMP, TJ
    FREISHEIM, JH
    KULINSKI, RF
    MONTGOMERY, JA
    EUROPEAN JOURNAL OF BIOCHEMISTRY, 1991, 196 (02): : 271 - 280
  • [45] Correlation between the mobility of spin-labeled peptide chains and resin solvation: An approach to optimize the synthesis of aggregating sequences
    Cilli, EM
    Marchetto, R
    Schreier, S
    Nakaie, CR
    JOURNAL OF ORGANIC CHEMISTRY, 1999, 64 (25): : 9118 - 9123
  • [46] ELECTRON-SPIN RESONANCE STUDIES OF SPIN-LABELED POLYMERS .7. DEPENDENCE OF ROTATIONAL CORRELATION TIMES ON SOLVENT PROPERTIES AND POLYMER CONCENTRATION
    BULLOCK, AT
    CAMERON, GG
    SMITH, PM
    JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1974, 70 (07): : 1202 - 1210
  • [47] EFFECTS OF VANADATE ON THE ROTATIONAL-DYNAMICS OF SPIN-LABELED CALCIUM ADENOSINE-TRIPHOSPHATASE IN SARCOPLASMIC-RETICULUM MEMBRANES
    LEWIS, SM
    THOMAS, DD
    BIOCHEMISTRY, 1986, 25 (16) : 4615 - 4621
  • [48] Magnetically Detected Protein Binding Using Spin-Labeled Slow Off-Rate Modified Aptamers
    Lu, Shutian
    Fowler, Catherine R. R.
    Ream, Brian
    Waugh, Sheela M. M.
    Russell, Theresa M. M.
    Rohloff, John C. C.
    Gold, Larry
    Cleveland, Jason P. P.
    Stoll, Stefan
    ACS SENSORS, 2023, 8 (06) : 2219 - 2227
  • [49] ELECTRON PARAMAGNETIC RESONANCE AND PROTON RELAXATION RATE STUDIES OF SPIN-LABELED CREATINE KINASE AND ITS COMPLEXES
    TAYLOR, JS
    MCLAUGHLIN, A
    COHN, M
    JOURNAL OF BIOLOGICAL CHEMISTRY, 1971, 246 (19) : 6029 - +
  • [50] ROTATIONAL CORRELATION TIMES OF IGG AND ITS FRAGMENTS SPIN-LABELED AT CARBOHYDRATE OR PROTEIN MOIETIES - SPATIALLY FIXED POSITION OF FC CARBOHYDRATE
    TIMOFEEV, VP
    DUDICH, IV
    SYKULEV, YK
    NEZLIN, RS
    FEBS LETTERS, 1978, 89 (02) : 191 - 195