Temperature dependent volumetric, ultrasonic and viscometric properties of cytosine solutions in pure water and in the presence of D-xylose and D-lactose

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-04-25 DOI:10.1016/j.molliq.2025.127621

Asha Sharmhal , Himani Singh , Richu , Umeshwari , Praveen Kumar Sharma , Ashwani Kumar , Ashish Kumar

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Abstract

In the present research work, the thermophysical properties of cytosine were examined across varying concentrations (0.005–0.030 mol kg⁻¹) in water and in aqueous solutions of D-xylose/D-lactose (0.05, 0.10, and 0.15 mol kg⁻¹) at specific temperatures ranging from 293.15–313.15 K under a pressure of 101.3 kPa. The parameters such as apparent molar volume (V_ϕ), limiting apparent molar volume (V⁰_ϕ), hydration number (n_H), limiting apparent molar expansivity (E⁰_ϕ), Hepler’s constant (∂E⁰_ϕ/∂T)_P, apparent specific volume (ASV), apparent molar isentropic compression (K_ϕ,s), limiting apparent molar isentropic compression (K⁰_ϕ,s), viscosity B-coefficients, transfer parameters as well as thermodynamic parameters related to viscous flow were estimated using experimentally determined physical properties like density, speed of sound and viscosity. Furthermore, the Co-sphere overlap model was employed to analyze the various potential interactions occurring in the prepared systems. The results indicated that, across all solution systems, the solute–solvent interactions intensified with rising temperatures and higher concentrations of saccharides. Additionally, the structure-breaking tendency of cytosine was assessed through the sign of Hepler’s constant data for all the investigated systems.

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在纯水和d -木糖和d -乳糖存在下胞嘧啶溶液的温度依赖性体积、超声和粘度特性

在本研究中，研究了胞嘧啶在不同浓度（0.005-0.030 mol kg - 1）的水中和d -木糖/ d -乳糖水溶液（0.05,0.10和0.15 mol kg - 1）中，在293.15-313.15 K的特定温度下，在101.3 kPa的压力下的热物理性质。表观摩尔体积（vφ）、极限表观摩尔体积（v0φ）、水合数（nH）、极限表观摩尔膨胀率（e0φ）、Hepler常数（∂e0φ /∂T）P、表观比容（ASV）、表观摩尔等熵压缩（kφ,s）、极限表观摩尔等熵压缩（k0φ,s）、粘度b系数、通过实验确定的物理性质，如密度、声速和粘度，估计了与粘性流动有关的传递参数和热力学参数。此外，利用共球重叠模型分析了制备体系中发生的各种潜在相互作用。结果表明，在所有的溶液体系中，溶质-溶剂的相互作用随着温度的升高和糖浓度的增加而增强。此外，通过对所有研究体系的Hepler常数数据的符号来评估胞嘧啶的结构破坏倾向。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.