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

Year: 2026

Type: article

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.

Source: Discover Chemistry.

DOI: 10.1007/s44371-026-00664-y

Authors: Adebayo T. Bale, William T. Pennington, Colin D. McMillen

Institutions: Clemson University, Kwara State University

Language: English

Topic: Polydiacetylene-based materials and applications

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: diamond

Funders: Clemson University, Tertiary Education Trust Fund

OpenAlex ID: W7154566402