Locking water molecules via ternary O–H⋯O intramolecular hydrogen bonds in perhydroxylated closo-dodecaborate
Journal Article
·
· Physical Chemistry Chemical Physics. PCCP
- ShanghaiTech Univ. (China); East China Normal Univ. (ECNU), Shanghai (China)
- East China Normal Univ. (ECNU), Shanghai (China)
- Wuhan Univ. (China)
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- ShanghaiTech Univ. (China)
A multitude of applications related to perhydroxylated closo-dodecaborate B12(OH)122− in the condensed phase are inseparable from the fundamental mechanisms underlying the high water orientation selectivity based on the base B12(OH)122−. Herein, we directly compare the structural evolution of water clusters, ranging from monomer to hexamer, oriented by functional groups in the bases B12H122−, B12H11OH2− and B12(OH)122− using multiple theoretical methods. A significant revelation is made regarding B12(OH)122−: each additional water molecule is locked into the intramolecular hydrogen bond B–O–H ternary ring in an embedded form. This new pattern of water cluster growth suggests that B–(H–O)⋯H–O interactions prevail over the competition from water–hydrogen bonds (O⋯H–O), distinguishing it from the behavior observed in B12H122− and B12H11OH2− bases, in which competition arises from a mixed competing model involving dihydrogen bonds (B–H⋯H–O), conventional hydrogen bonds (B–(H–O)⋯H–O) and water hydrogen bonds (O⋯H–O). Through aqueous solvation and ab initio molecular dynamics analysis, we further demonstrate the largest water clusters in the first hydrated shell with exceptional thermodynamic stability around B12(OH)122−. These findings provide a solid scientific foundation for the design of boron cluster chemistry incorporating hydroxyl-group-modified borate salts with potential implications for various applications.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 2572437
- Alternate ID(s):
- OSTI ID: 2001021
- Report Number(s):
- PNNL-SA--190035
- Journal Information:
- Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 37 Vol. 25; ISSN 1463-9076; ISSN 1463-9084
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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