Smooth, it is the indispensable element in life activity, also apply at the square field surface of modern society, from floral photosynthesis, to large-scale lighting equipment, the mankind is mixed to be being used solely exploration, accompanying the progress of science and technology and development, improving the life of people ceaselessly. Among them the adornment colour that diversiform organic dye abounded people not only, still can help people detect cancer cell and all sorts of harmful material. Theory of conjugate of key of price of support of traditional and organic dye undertakes the structure is optimized with function adjusting control, wide application received in each domains. Current, the abnormal light that give is shown when organic material is collecting conjugate of more and more the key that be not valence physical behavior (bunch gives off light) with distinctive glow mechanism, got pay close attention to extensively. The blame conjugate with new development system of data of organic bunch glow, dug structure and function concern, solve the difficult problem with accident of wave of glow of bunch glow material and small efficiency, it is the heat that at present bunch glow material studies and forward position. Recently, zhejiang university Zhang Hao but deputy researcher, Professor Zhang Xinghong and group of Tang Benzhong academician, the design developed conjugate of a kind of new-style blame colophony of phenolic aldehyde of —— of system of data of organic bunch glow, use cheap easy raw material and simple synthetic measure realized resinous of blame conjugate phenolic aldehyde through force of interaction of adjusting control space close infra-red bunch gives off light.
In this job, be based on this to study the group is in 3 fragrant base the research foundation of dug of mechanism of methane bunch glow and function adjusting control, it is initiative structure with the simplest phenolic aldehyde colophony, use increase dimensional interaction base yuan came true to form a cluster to phenolic aldehyde system with two kinds of politic successes that introduce push-pull electron effect the adjusting control of glow function. Phenol formaldehyde colophony (Phenol-Formaldehyde Resin, the dimensional interaction force of PF) oneself is weaker, can give out faint La Guang when Gao Nong is spent only, through increasing new dimensional interaction base yuan or introduce lay electronic radical group, enhanced interaction of space of phenolic aldehyde resinous successfully to get more Gong Gengliang's bunch gives off light; Enhance dimensional interaction further through combining two kinds of methods base yuan electronic density, obtained emissive wavelengh to be in of 800 Nm above close infra-red emissive bunch gives off light, and efficiency of highest dazzled photons can be amounted to 47% ; The phenolic aldehyde resin that uses compose of push-pull electron effect to build realizes the glow of 600 Nm above successfully to blast off.
Pass experimental analysis and theoretical calculation, summed up the glow mechanism of phenolic aldehyde system, shorten through polymerization namely base the dimensional interaction that round span leaves and provides measurable rigid generation stability. 3 kinds of emissive mechanisms that exist at the same time are, isolated base yuan valence key conjugate blasts off, photograph adjacent base yuan the condition of region of dimensional conjugate bureau between blasts off with for sucking electronic radical yuan the condition of space charge move between blasts off. On put together, this job from common project colophony of plastic phenolic aldehyde sets out, enhanced the dimensional interaction of phenolic aldehyde system successfully through effective adjusting control strategy, came true to give off light to the bunch of close infra-red area from deep La Guang. Colophony of blame conjugate phenolic aldehyde is close the implementation that infra-red bunch gives off light gifted not only the tremendous and economic value that phenolic aldehyde system regards new-style and organic glow as material, and the smooth physics mechanism that gives off light in bunch has fundamental theoretical value on research. Relevant paper is published at Angew. Chem. Int. Ed. , the first author of the article fastens Zhang Ziteng for Zhejiang university high polymer (doctoral graduate student) with Chemstry Department of university of Hong Kong science and technology Zhang Jian grants (postdoctoral) . Textual link: NIR Clusteroluminescence Of Non-coNjugated Phenolic Resins Enabled By Through-Space Interactions Ziteng Zhang, jianyu Zhang, zuping Xiong, bo Chu, chengjian Zhang, jing Zhi Sun, haoke Zhang* , xing-Hong Zhang* , ben Zhong Tang* Angew. Chem. Int. Ed. , 2023, DOI: 10.1002/anie.202306762 https://doi.org/10.1002/anie.202306762