Publications by authors named "Ya-Yan Tong"
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.
pH-Dependent reversible crystal transformation of 1-carboxymethyl-1-methyl-pyrrolidinium bromides and their spectroscopic fingerprint.
Spectrochim Acta A Mol Biomol Spectrosc
March 2018
In this work, two 1-carboxymethyl-1-methyl-pyrrolidinium bromides (N-methylpyrrolidine betaine hydrobromides) with the stoichiometry of betaine:hydrobromic acid as 1:1 and 2:1, denoted as CMPRHBr-I and CMPRHBr-II, respectively, were prepared and crystallographically determined. The large difference in these two structures is the type of hydrogen bonds, resulting in the different thermal stability. A strong OH⋯Br hydrogen bond was observed in CMPRHBr-I, whereas O⋯H⋯O hydrogen bond in CMPRHBr-II.
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