What question did this study set out to answer?

This research aims to characterize chemically modified sodium 10,12-pentacosadiynoate and its precursor in terms of thermal and structural properties.

April 18, 2026Open Access

Spectroscopic and thermal characterization of chemically modified 10,12-pentacosadiynoic acid (PCDA) and its sodium salt (PCDA-Na)

Key Points

This research aims to characterize chemically modified sodium 10,12-pentacosadiynoate and its precursor in terms of thermal and structural properties.
Synthesis of sodium 10,12-pentacosadiynoate from 10,12-pentacosadiynoic acid using varied sodium carbonate and sodium hydroxide ratios.
Characterization techniques included FT-IR, PXRD, DSC, TGA, and elemental analysis to confirm salt formation and assess properties.
FT-IR analysis showed a shift of 146 cm⁻¹ indicating ion formation.
PXRD indicated a 44% increase in crystallite size after modification.
TGA results revealed decarboxylation of 33.6% and diacetylene decomposition of 36.2%, confirming thermal robustness up to 195 °C.

Abstract

Sodium 10,12-pentacosadiynoate (PCDA-Na) was synthesized from 10,12-pentacosadiynoic acid (PCDA) using Na₂CO₃ (1:2) and NaOH (1:1) routes. Comprehensive characterization by FT-IR, PXRD, DSC, TGA, and elemental analysis confirmed salt formation. FT-IR revealed Δν = 146 cm⁻¹ for ionic COO⁻, PXRD showed 44% crystallite size increase, and TGA identified decarboxylation (33.6%) followed by diacetylene decomposition (36.2%). These findings establish PCDA-Na as a thermally robust (stable to 195 °C) PDA precursor with enhanced crystallinity, addressing the gap in alkali metal diacetyleneate thermal-structure relationships for sensor applications.

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Cite This Study

Bale et al. (Thu,) studied this question.

synapsesocial.com/papers/69e31f9e40886becb653eddb https://doi.org/https://doi.org/10.1007/s44371-026-00664-y

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