Optimizing the gas sensing properties of sandwich-type phthalocyaninato europium complex through extending the conjugated framework

• DOI: 10.1016/j.dyepig.2018.09.062
• Publication Date: 2018-09-26T07:06:41Z
• Authors: Guang Lu; Xia Kong; Chiming Wang; Luyang Zhao; Dongdong Qi; Yuying Jiang; Shuai Zhao; Yanli Chen; Jianzhuang Jiang
• Keywords: Europium; Ambipolar diffusion

Abstract Incorporation of the dimeric phthalocyanine into sandwich phthalocyaninato europium framework extends the conjugated electronic molecular structure and optimizes the ambipolar semiconducting properties of the QLS thin film-based OFET device, resulting in a significant increase in the hole and electron mobilities from 4.30 × 10−7 and 0.70 × 10−7 cm2 V−1 s−1 for monomeric phthalocyanine-containing triple-decker Eu2[Pc(SC6H13)8]3 (1) to 0.07 and 0.06 cm2 V−1 s−1 for the dimeric phthalocyanine-containing quintuple-decker [Pc(SC6H13)8]2Eu2[BiPc(SC6H13)12]Eu2[Pc(SC6H13)8]2 (2). This in turn induces an enhanced gas sensing detection performance for NO2 with the sensitivity increasing from 23.4% for 1 to 46.7% ppm−1 for 2. The present result appears interesting in terms of improving the gas-sensing properties of phthalocyanine-based molecular materials via molecular design and synthesis rather than tuning the film morphology.