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Stable UV absorption material synthesized by intercalation of squaric acid anion into layered double hydroxides

Shi-Feng Li, Yan-Ming Shen, Min Xiao, Zhi-Gang Zhang, and Wen-Xiu Li

Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang, 110142, China



Abstract: A novel UV absorption material of squaric acid (SA) anion (C4O42- ) intercalated layered double hydroxides (LDHs) was successfully synthesized by the co-precipitation method. After intercalation, the interlayer distance of MgAl-SA-LDHs increased to 1.04 nm compared to those of MgAl-CO3- LDHs and SA anions present in form of a monolayer in the interlayer of LDHs. Thermal stability of SA clearly enhanced by the intercalation and the suppression of the deintercalation ability of MgAl-SA-LDHs was superior to that of 4-hydroxy-3-methoxybenzoic acid intercalated LDHs. The results of UV-DRS indicate the potential application of MgAl-SA-LDHs as UV absorbers.

Keywords: UV absorber – squaric acid – intercalation – layered double hydroxides

Full paper is available at

DOI: 10.1515/chempap-2015-0039


Chemical Papers 69 (3) 456–461 (2015)

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