Air-stable diradical dications with ferromagnetic interaction exceeding the thermal energy at room temperature: from a monomer to a dimer

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（3）
• 页码范围: 300-305
• 页数: 6页
• 语种: 英文

摘要

Two tetraazacyclophane dications (12+ and 22+) with different remote substituents have been synthesized,isolated and characterized.Their electronic structures and physical property were studied by various spectroscopic techniques,single crystal X-ray diffraction,super conducting quantum interference device (SQUID) measurements and theoretical calculations.The dications have triplet ground states with ferromagnetic interaction exceeding the thermal energy at room temperature.The solid-state structures of these species were tunable by substituent effect,with 12+ as a monomer and 22+ as a dimer.