V 570

Melting points were measured on a Büchi M-565 apparatus and were uncorrected. NMR spectra were obtained with an AL-400 spectrometer at ambient temperature by using CDCl₃ as a solvent and tetramethylsilane as an internal standard for ¹H and ¹³C, unless otherwise indicated. IR spectra were obtained on a Thermo Scientific Nicolet iS5 FT-IR spectrometer with an iD5 ATR diamond plate. UV-vis-NIR and fluorescence spectra were recorded on Jasco V-570 and Hitachi F-4500 spectrophotometers, respectively. Absolute quantum yields were measured with a Hamamatsu Photonics C 9920-03G spectrophotometer. Mass spectra were obtained either with a JEOL JMS-700 (EI, 70 eV; FAB⁺, p-nitrobenzyl alcohol) or with a JEOL JMS-S3000 (MALDI-TOF). Elemental analyses were performed with a Yanaco MT-5 elemental analyzer at ADRES, Ehime University. Preparative GPC using LC-911 or LC-916 with Jaigel-1H and 2H was performed by Japan Analytical Industry Ltd. Co. Dehydrated solvents were purchased from Kanto Chemical Co. and used without further purification. Commercially available materials were used without further purification.