Enhanced performance from a hybrid quenchometric deoxyribonucleic acid (DNA) silica xerogel gaseous oxygen sensing platform

• Published in: Applied spectroscopy Vol. 68; no. 11; p. 1302
• Main Authors: Zhou, Bin, Liu, Ke, Liu, Xin, Yung, Ka Yi, Bartsch, Carrie M, Heckman, Emily M, Bright, Frank V, Swihart, Mark T, Cartwright, Alexander N
• Format: Journal Article
• Language: English
• Published: United States 01.11.2014
• Subjects: Animals; Cetrimonium Compounds - chemistry; DNA - chemistry; Luminescent Agents - chemistry; Luminescent Measurements; Oxygen - analysis; Salmon; Silicon Dioxide - chemistry
• ISSN: 1943-3530
• DOI: 10.1366/13-07430

A complex of salmon milt deoxyribonucleic acid (DNA) and the cationic surfactant cetyltrimethylammonium (CTMA) forms an organic-soluble biomaterial that can be readily incorporated within an organically modified silane-based xerogel. The photoluminescence (PL) intensity and excited-state luminescence lifetime of tris(4,7'-diphenyl-1,10'-phenanathroline) ruthenium(II) [(Ru(dpp)3](2+), a common O2 responsive luminophore, increases in the presence of DNA-CTMA within the xerogel. The increase in the [Ru(dpp)3](2+)excited-state lifetime in the presence of DNA-CTMA arises from DNA intercalation that attenuates one or more non-radiative processes, leading to an increase in the [Ru(dpp)3](2+) excited-state lifetime. Prospects for the use of these materials in an oxygen sensor are demonstrated.