Premium
Influencing the Dimensionality of Ni/Co‐Bipyrazole‐Based Coordination Frameworks through Anions and Thermal Activation
Author(s) -
Freund Ralph,
Kraft Maryana,
Volkmer Dirk
Publication year - 2022
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100853
Subject(s) - chemistry , crystal structure , crystallography , single crystal , stereochemistry
Thirteen Ni(II) and Co(II) coordination polymers based on the organic linker 1H,1′H‐4,4′‐bipyrazole (H 2 BPZ) were synthesized and characterized using single crystal X‐ray diffraction, namely Ni(H 2 BPZ)(acac) 2 ( 1 ), Ni(H 2 BPZ) 2 (H 2 O) 2 ⋅ (NO 3 ) 2 ( 2 ), Ni 3 (H 2 BPZ) 6 Cl 6 ⋅ (DMSO) 4 ( 3 ), Ni 8 (H 2 BPZ) 16 Cl 16 ⋅ (DMSO) 6 ( 4 ), Ni(H 2 BPZ) 2 (H 2 O) 6 ⋅ (ClO 3 ) 2 (H 2 O) 3 ( 5 ), the isotypic structures Ni(H 2 BPZ) 2 (CH 3 SO 3 ) 2 ( 6 ) and Co(H 2 BPZ) 2 (CH 3 SO 3 ) 2 ( 7 ), Co(H 2 BPZ) 2 (CF 3 SO 3 ) 2 ( 8 ), Ni(H 2 BPZ) 3 ⋅ (CF 3 SO 3 ) 2 ( 9 ), Ni(H 2 BPZ) 3 ⋅ (ClO 4 ) 2 ( 10 ), Co(H 2 BPZ) 3 ⋅ (ClO 4 ) 2 ( 11 ), Ni(BPZ) ⋅ (DMF) 0.65 ( 12 ), and Ni(BPZ) ( 13 ). In order to study the structural correlations of 1D‐3D, 2D‐3D, and 3D‐3D phase transitions the structures were investigated by means of thermal analysis. In addition, the role of charge‐balancing anions with respect to their coordination strength on structure, framework dimension, and crystal properties is discussed in detail. This work exemplifies the function of anions as structure directing agents and how they, as well as thermal activation, can influence framework topology, dimensionality, and crystal size.