Correlation between Hydrogen Bond Strength and Temperature: A Quantitative Single-Molecule Study over a Broad Temperature Range DOI

Minghan Hu,

Jiu-Long Zhou,

Li Jiang

et al.

The Journal of Physical Chemistry B, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Temperature is widely acknowledged as a crucial factor influencing the strength of hydrogen bonds (H-bonds). While qualitative relationship between temperature and H-bond well-established, quantitative details this remain largely unexplored. Variable-temperature single-molecule force spectroscopy in vacuum (VT-Vac-SMFS) now provides direct accurate method to quantify intrinsic (i.e., without interference from other external factors). Herein, poly(hydroxyethyl methacrylate), model polymer capable forming H-bonds side chains, was used examine variations across range 261 363 K by VT-Vac-SMFS. The experimental data reveal significant decline increases. Based on theoretical analysis, we propose, for first time, nonlinear correlation (ΔG*) with an empirical equation: ΔG* = 7.88 - 1.34ln(T 251.64). This formula enables prediction at various temperatures within reasonable range, which insights into precise control through regulation. Although may not be universally applicable, pioneering work represents upgrade our understanding fundamental perspective.

Language: Английский

Correlation between Hydrogen Bond Strength and Temperature: A Quantitative Single-Molecule Study over a Broad Temperature Range DOI

Minghan Hu,

Jiu-Long Zhou,

Li Jiang

et al.

The Journal of Physical Chemistry B, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Temperature is widely acknowledged as a crucial factor influencing the strength of hydrogen bonds (H-bonds). While qualitative relationship between temperature and H-bond well-established, quantitative details this remain largely unexplored. Variable-temperature single-molecule force spectroscopy in vacuum (VT-Vac-SMFS) now provides direct accurate method to quantify intrinsic (i.e., without interference from other external factors). Herein, poly(hydroxyethyl methacrylate), model polymer capable forming H-bonds side chains, was used examine variations across range 261 363 K by VT-Vac-SMFS. The experimental data reveal significant decline increases. Based on theoretical analysis, we propose, for first time, nonlinear correlation (ΔG*) with an empirical equation: ΔG* = 7.88 - 1.34ln(T 251.64). This formula enables prediction at various temperatures within reasonable range, which insights into precise control through regulation. Although may not be universally applicable, pioneering work represents upgrade our understanding fundamental perspective.

Language: Английский

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