High-Pressure Raman Spectroscopy of Tris(hydroxymethyl)aminomethane

Abstract

High-pressure Raman spectroscopy has been used to study tris(hydroxymethyl)aminomethane (C(CH(2)OH)(3)NH(2), Tris). Molecules with globular shapes such as Tris have been studied thoroughly as a function of temperature and are of fundamental interest because of the presence of thermal transitions from orientational order to disorder. In contrast, relatively little is known about their high-pressure behavior. Diamond anvil cell techniques were used to generate pressures in Tris samples up to approximately 10 GPa. A phase transition was observed at a pressure of approximately 2 GPa that exhibited relatively slow kinetics and considerable hysteresis, indicative of a first-order transition. The Raman spectrum becomes significantly more complex in the high-pressure phase, indicating increased correlation splitting and significant enhancement in the intensity of some weak, low-pressure phase Raman-active modes.

Polymerization‐Driven Photoluminescence in Alkanolamine‐Based C‐Dots

“…Moreover, the C‐NH 2 bending is detectable at 419 cm −1 . The main vibrations at 1034 cm −1 and 1254 cm −1 are attributed to NH 2 twisting and OH bending, respectively [26] …”

“…[25] Tris displays two main bands at about8 00 cm À1 and 520 cm À1 owing to CÀCs tretching and CÀC(N)-C bending, respectively.M oreover,t he C-NH 2 bending is detectable at 419 cm À1 .T he main vibrations at 1034 cm À1 and 1254 cm À1 are attributed to NH 2 twistinga nd OH bending, respectively. [26] The thermaltreatment of the citric acid and Tris mixture promotes the formationo fn ew bands and ar einforcemento ft he characteristic precursor's vibrations. In particular, an ew mode at 240 cm À1 arises, af ew minutes after melting.…”

Method development for in situ study of marine vanadium peroxidase based on SERS and chemometrics

“…The peaks assigned by us as Tris-SO 4 were in good correlation with literature. [50][51][52][53] Peaks stemming from SO 4 2− and HSO 4 − species 54,55 and protein peaks were also detected. 36,[56][57][58][59] Based on Figure 1, we selected the peak 570 cm −1 to represent the pure Tris-SO 4 signal and 1651 cm −1 to represent C-VBPO signal in subsequent CCF modelling.…”

Preparation of microencapsulated medium temperature phase change material of Tris(hydroxymethyl)methyl aminomethane@SiO2 with excellent cycling performance

“…The phase change characteristics of the solid-solid PCMs including Pentaerythritol, Tris(hydroxymethyl)methyl aminomethane, Neopentyl glycol and 2-Amino-2-methyl-1,3-propanediol were widely studied [25][26][27][28][29]. Tris(hydroxymethyl)methyl aminomethane (Tris) with latent heat enthalpy of about 260 J/g is one of the most favorite solid-solid PCMs which can be applied in medium temperature range [29][30][31]. The potential application of Tris in the field of industrial waste heat utilization could still be expected, especially in the mobilized thermal energy storage system, though the degree of subcooling was found to be about 65°C in the discharging process [27,30].…”

“…Tris(hydroxymethyl)methyl aminomethane (Tris) with latent heat enthalpy of about 260 J/g is one of the most favorite solid-solid PCMs which can be applied in medium temperature range [29][30][31]. The potential application of Tris in the field of industrial waste heat utilization could still be expected, especially in the mobilized thermal energy storage system, though the degree of subcooling was found to be about 65°C in the discharging process [27,30]. The low heat-releasing temperature, about 68°C, can not only meet the domestic demands, but also reduce the technical difficulties of heat preservation in long-distance delivery.…”