Weak interactions cause selective cocrystal formation of lanthanide nitrates and tetra-2-pyridinylpyrazine

CrystEngComm ◽  
2018 ◽  
Vol 20 (8) ◽  
pp. 1123-1129 ◽  
Author(s):  
Cheng-Hui Zeng ◽  
Haiming Wu ◽  
Zhixun Luo ◽  
Jiannian Yao
Keyword(s):  
Hydrogen Bonding ◽  
Energy Transfer ◽  
Weak Interactions ◽  
Hydrogen Bonding Interactions ◽  
Lanthanide Contraction ◽  
Weak Hydrogen Bonding ◽  
Contraction Effect ◽  
Lanthanide Nitrates

Two series of cocrystals Ln(NO3)5·H2TPPZ are synthesized enlightening the lanthanide contraction effect and weak hydrogen bonding interactions in determining the selective cocrystallization, stability and energy transfer for luminescence.

scholarly journals Photocapture of dynamic hydrogen-bonded assemblies

2004 ◽  
Vol 6 (4) ◽  
pp. 185-192 ◽  
Author(s):  
Nathan D. McClenaghan ◽  
Dario M. Bassani
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Supramolecular Assemblies ◽  
Topochemical Reaction ◽  
Hydrogen Bonding Interactions ◽  
Recent Advances ◽  
Weak Hydrogen Bonding ◽  
Supramolecular Template ◽  
Multiple Hydrogen Bonds ◽  
Hydrogen Bonded

Recent advances in the continuing study of [2+2] photodimerization reactions in supramolecular, non-covalent systems are presented. The covalent photocapture of small dynamic assemblies which are formed using weak hydrogen-bonding interactions between two different complementary units, barbiturates and melamines, is discussed. One unit serves as a photo-inert supramolecular template capable of bringing two photoactive units together using multiple hydrogen-bonds. The second type of unit unites the corresponding, complementary hydrogen-bonding motif with a photoactive unit. Irradiation of the supramolecular assemblies leads to photodimerization of adjacent units and generation of an imprinted site for the template. Moieties which are adapted to participate in photodimerization reactions are styrene, cinnamate, stilbene and fullerene units. The results are interpreted on the basis of topochemical reaction control.

(Pyrazole)silver(I) and -gold(I) Complexes with Strong and Weak Hydrogen-Bonding Interactions as the Basis of One- or Two-Dimensional Structures

2004 ◽  
Vol 2004 (15) ◽  
pp. 3089-3098 ◽  
Author(s):  
M. Luz Gallego ◽  
Paloma Ovejero ◽  
Mercedes Cano ◽  
José V. Heras ◽  
José A. Campo ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Two Dimensional ◽  
Hydrogen Bonding Interactions ◽  
Weak Hydrogen Bonding
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