摘要
我们利用有机配体N,N,N',N'-四苄基-反式-1,2-二氨基环己烷(L)和FeCl_3·6H_2O得到了两种二次球形配位配合物的同质多晶:α-phase(P2_1/c)和β-phase(Pna2_1).~([1])β-phase可以通过液体辅助研磨(LAG)来获得,~([2])对于与尿素相比,极性β-phase晶体的二次斜坡效应非常的显著。
Herein,we report a racemic crystalline form of the organic N,N,N',N'-tetrabenzyl-trans-1,2-diaminocyclohexane(L),and it racemic polymorphism in the second sphere adduct[LH]~+·[FeCl_4]~-.Upon self-assembling L with FeCl_3·6H_2O in HC1,[LH]~+·[FeCl_4]~- crystallizes as two polymorphs:α-phase(P2_1/c) and β-phase(Pna2_1).The selective formation of the β-phase can be obtained by means of liquid assisted grinding(LAG).~2The single crystal second harmonic generation(SHG) behavior for the polar β-phase is reported,which shows significant efficiency compared to that of urea.
引文
1 H.B.Yu,H.T.Li and F.Guo,Cryst Eng Comm.,2016,18,2408.
2(a)S.Aitipamula,P.S.Chow and R.B.H.Tan,Cryst Eng Comm.,2014,16,3451;(b)N.K.Duggirala,M.L.Perry,?.Almarsson and M.J.Zaworotko,Chem.Comm.,2016,52,640.