A vapochromic strategy for ammonia sensing based on a bipyridinium constructed porous framework.
Chen, Cheng; Rao, Huizhen; Lin, Shen; Zhang, Jie; Dalton transactions (Cambridge, England : 2003) 47 (2018) 8204–8208; doi:10.1039/c8dt01728j

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;
 A vapochromic strategy for ammonia sensing based on a bipyridinium
 constructed porous framework.
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