One-pot synthesis and fluorescence properties of nitrogen containing polyphosphates with aggregation-induced emission
Non-conjugated aggregation-induced emission(AIE)luminogens,without π-conjugated structures,have the advan-tages of excellent biocompatibility and environmental friendliness.Therefore,they are emerging as a series of new emitting materi-als in biological imaging,biological medicine and so on.However,there are still some drawbacks in the research of nonconventional AIE luminogens,such as the deficient of diversity,low quantum yield,weak fluorescence intensity,which limited their develop-ment.In this study,polyphosphates containing nitrogen,T1 and T2,were synthesized by low toxicity and low corrosion dimethyl phosphonate and triisopropanolamine or triethanolamine through transesterification reaction without solvent or catalyst.The results show that T1 and T2 can emit bright blue fluorescence under UV light.The fluorescence intensity increases with the increase of concentration,showing significant AIE characteristics,which enriches the type of non-traditional AIE materials.The fluorescence intensity and quantum yield of T1 are better than that of T2 due to the methyl groups on side chain structure.That provides a new method for regulating the fluorescence properties of polymers.Particularly,T1 can absorb formaldehyde in the air,and the color change from colorless to pink after adsorbing formaldehyde.At the same time,its fluorescence intensity increase with the concentra-tion increasement of the adsorbed formaldehyde,which can realize the fluorescence-colorimetric dual-channel detection of formalde-hyde.This provides a new method for sensitive detection of formaldehyde.
aggregation-induced emissionnon-conjugatedpolyphosphatetransesterification reactionadsorption and detection of formaldehyde
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