Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain.
Phys Chem Chem Phys. 2013 Jun 14;15(22):8811-20. doi: 10.1039/c3cp44627a. Epub 2013 May 2.
A solvatochromic analysis of available absorption and LE and TICT emission data in p-dimethylaminobenzonitrile (DMABN) was conducted. Applying the Abe method to the results of a thermochromic analysis of DMABN in 1-chlorobutane (ClB) allowed us to determine the polarizability and dipole moment of the excited electronic states involved in the absorption and emission transitions. As shown herein, the LE → TICT excited state reaction for DMABN is triggered by the solvent polarity but is additionally influenced by the viscosity. The experimental evidence negates the assumption that the radiative constant for the TICT fluorescence of DMABN is temperature-dependent.
对 p-二甲基氨基苯甲腈 (DMABN) 的可用吸收和 LE 和 TICT 发射数据进行了溶剂变色分析。应用 Abe 方法对 1-氯丁烷 (ClB) 中 DMABN 的热致变色分析结果进行分析，使我们能够确定吸收和发射跃迁中涉及的激发电子态的极化率和偶极矩。如本文所示，LE→TICT 激发态反应是由溶剂极性引发的，但也受到粘度的影响。实验证据否定了 DMABN 的 TICT 荧光辐射常数随温度变化的假设。
