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Structural Transformation Pathways of Alkaline Earth Family Coordination Polymers Containing 3,3',5,5'-Biphenyl Tetracarboxylic Acid. | LitMetric

Structural Transformation Pathways of Alkaline Earth Family Coordination Polymers Containing 3,3',5,5'-Biphenyl Tetracarboxylic Acid.

Chem Asian J

Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, 453007, China.

Published: June 2019

AI Article Synopsis

  • The study focuses on the importance of understanding the stepwise transformation of crystals to improve the preparation processes for crystal materials, especially alkali earth coordination polymers (CPs).
  • Different intermediate structures were isolated during the creation of three pairs of CPs using solvothermal methods and oil-bath reactions.
  • Crystal analysis revealed that for Ca-CPs and Sr-CPs, the structure changed from 0D to 1D, while for Ba-CPs, it shifted from 1D to 0D, and these transformations were influenced by factors like organic acid deprotonation and the relationships between inorganic and organic structures.

Article Abstract

The understanding of crystal stepwise transformation is very important to enclose the "black box" in the preparation of crystal materials. In this work, different structural intermediates were isolated prior to the formation of the final alkali earth coordination polymers (CPs) during the preparation of three pairs of alkali earth CPs through solvothermal method and convenient oil-bath reactions. Single crystal X-ray diffraction analysis demonstrated the structural transformation from a 0 D to 1 D inorganic connectivity for the Ca-CPs and Sr-CPs, but a 1 D to 0 D inorganic connectivity for Ba-CPs, involving the breakage/formation of chemical bonds in the reaction solutions. Further analyses indicated that these two different structural transformation pathways are determined by the deprotonation of organic acid, competitive balance between the inorganic and organic connectivity, and the twist of the linker. FT-IR spectra, thermogravimetric and luminescence behaviors agree with their structural characteristics.

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Source
http://dx.doi.org/10.1002/asia.201900209DOI Listing

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