Coordination polymers from mild condition reactions of copper(II) carboxylates with pyrazole (Hpz). Influence of carboxylate basicity on the self-assembly of the [Cu3(μ3-OH)(μ-pz)3]2+ secondary building unit
作者:Sara Massignani、Rebecca Scatena、Arianna Lanza、Magda Monari、Francesca Condello、Fabrizio Nestola、Claudio Pettinari、Federico Zorzi、Luciano Pandolfo
DOI:10.1016/j.ica.2016.05.009
日期:2017.1
[Cu 3 ( μ 3 -OH)( μ -pz) 3 ] fragment whose double positive charge is balanced by two coordinated carboxylate ions, actually [Cu 3 ( μ 3 -OH)( μ -pz) 3 (Phac) 2 ], 1 , [Cu 3 ( μ 3 -OH)( μ -pz) 3 (Vnac) 2 (Hpz)], 2 , [Cu 3 ( μ 3 -OH)( μ -pz) 3 (Phacr) 2 ], 3 , [Cu 3 ( μ 3 -OH)( μ -pz) 3 (Phpr) 2 (Hpz)}Cu 3 ( μ 3 -OH)( μ -pz) 3 (Phpr) 2 (Hpz)(H 2 O)}]· x H 2 O· y MeOH, 4 , [Cu 3 ( μ 3 -OH)( μ -pz)
[Cu 3(μ3 -OH)(μ-pz)3(Phpr)2(Hpz)} Cu 3(μ3 -OH)(μ-pz)3(Phpr)2(Hpz)(H 2 O )}] x H 2 O·y MeOH,4,[Cu 3(μ3 -OH)(μ-pz)3(c -Hexc)2],5,[Cu 3(μ3 -OH)(μ -pz)3(Lau)2],6,[Cu 3(μ3 -OH)(μ-pz)3(Myr)2],7,[Cu 3(μ3 -OH)(μ-pz)3 (Piv)2(HPz)(HPiv)2],8。此行为与先前观察到的某些特征相符,并且表明羧酸根离子的碱度是Hpz和水去质子化的关键,导致形成pz-和OH-离子,这些离子决定了Hpz和水的自组装。三核三角种。单晶XRD测定证明在化合物1、2和5中,三核部分进一步自组装,产生一维配位聚合物,或者在一种情况下(化合物4),形成十二指核离散组装。