In this study, to detect amine gases such as ammonia, a kind of biological gas, with high sensitivity, we fabricated a device that combines an inverse opal photonic crystal (IOPC) and 2‐(4‐oxo‐3,4‐dihydroquinazolin‐2‐yl)phenyl acetate (HPQ‐Ac), a precursor of the aggregation‐induced emission luminogen. IOPC silica structures (200IOPC, 350IOPC, 500IOPC) with SiO₂ were respectively obtained after calcination with 200, 350, and 500 nm polystyrene (PS) nanoparticles used as templates and tetraethyl orthosilicate (TEOS) formed by self‐assembly on a slide glass. Furthermore, mesopore‐introduced IOPC (50 nm‐350IOPC) was prepared by mixing 350 and 50 nm PS particles in TEOS solution. Each IOPC was infiltrated with HPQ‐Ac, reacted with ammonia, and the rate of change in emission intensity owing to fluorescence was examined. The highest response was obtained for 350IOPC infiltrated with HPQ‐Ac among the three IOPCs without mesopores. The 50 nm‐350IOPC had higher sensitivity than 350IOPC and was found to be able to detect 50 ppb ammonia gas.

中文翻译：

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通过聚集诱导发射光致发光剂的前体HPQ-Ac渗透的反蛋白石光子晶体检测胺气体

在这项研究中，为了以高灵敏度检测氨气（一种生物气体）等胺类气体，我们制造了一种结合了反蛋白石光子晶体（IOPC）和2-（4-氧代-3,4-二氢喹唑啉-乙酸2-基）苯乙酸酯（HPQ‐Ac），是聚集诱导的发光发光剂的前体。具有SiO _2的IOPC二氧化硅结构（200IOPC，350IOPC，500IOPC）在分别用200、350和500 nm聚苯乙烯（PS）纳米颗粒作为模板以及在载玻片上自组装形成的原硅酸四乙酯（TEOS）分别煅烧后获得。此外，通过在TEOS溶液中混合350和50 nm PS颗粒来制备中孔引入的IOPC（50 nm-350IOPC）。每个IOPC都被HPQ-Ac渗透，与氨反应，并检查了由于荧光导致的发射强度变化率。在三个没有介孔的IOPC中，用HPQ-Ac渗透的350IOPC的响应最高。50 nm‐350IOPC的灵敏度高于350IOPC，被发现能够检测50 ppb的氨气。