Conformation Analysis and Thermodynamics of Binding Behavior of DABCO to p/p type Dimeric Porphyrin

• 出 处: Chinese Chemical Letters
• 发表日期: 2000年11期
• 关键词: porphyrin covalently conformation considerably Figure steric listed stoichiometr

The binding conformations of bidentate ligand DABCO(1,4-diazobicyclo [2,2,2]octane) to a series of p/p type zinc porphyrin dimers covalently linked with flexible alkoxy chain -O(CH2)nO- (n=2~10) are described by 1H NMR and UV-vis spectroscopy. DABCO can bind inside the cavities of porphyrin dimers and form a ternary sandwich complex as the alkoxy chain length is long enough. The thermodynamic parameters which control the binding behavior are investigated.

The binding mechanism of bidentate ligand DABCO (1,4-diazobicyclo [2,2,2] octane) to a series of p / p type zinc porphyrin dimers covalently linked with a flexible alkoxy chain -O (CH2) nO- ~ 10) are described by 1H NMR and UV-vis spectroscopy. DABCO can bind inside the cavities of porphyrin dimers and form a ternary sandwich complex as the alkoxy chain length is long enough. The thermodynamic parameters which control the binding behavior are investigated.