Laser-induced structural variations in single crystals of 2-benzyl-5-benzylidene-cyclopentanone

被引：8

作者：

Davaasambuu, J ^{[1
]}

Busse, G ^{[1
]}

Techert, S ^{[1
]}

机构：

[1] Max Planck Inst Biophys Chem, Abt Spekt & Photochem Kinet, D-37077 Gottingen, Germany

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2005年 / 38卷 / 10A期

关键词：

Aromatic compounds - Carbon - Chemical bonds - Single crystals - Spectroscopic analysis - X ray diffraction;

D O I：

10.1088/0022-3727/38/10A/039

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Laser- and light-induced charge density variations in organic molecular single crystals of 2-benzyl-5-benzylidene-cyclopentanone (BBCP) have been investigated using high resolution x-ray diffraction and spectroscopic methods. In BBCP single crystals a cyclobutane ring is formed from two parallel double bonds of neighbouring molecules by light irradiation. Due to this photodimerization, the bond lengths, bond angles and electron density are strongly changed near the C=C double bonds in the molecules, as has been shown by spectroscopic techniques and diffraction methods. Also, the overall transformation of the crystals from the reactant to the product state via a transient structure with a picosecond lifetime has been found by time-resolved x-ray diffraction, and by the time-correlated single-photon counting measurements.

引用

页码：A204 / A207

页数：4

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