Synthesis of rare earth samarium-poly(ethylene glycol)polymer light conversion agent and its fluorescence properties
A novel Sm[CHA(PEG)]polymer light conversion agent was synthesized by pre-paring the polymer ligand CHA(PEG)with cyanuric chloride crosslinked polyethylene gly-col,8-hydroxyquinoline,and lauryl alcohol,and carrying out coordination reaction with Sm3+.FTIR,XPS,XRD,fluorescence spectroscopy,UV,TGA,and other testing methods were used to analyze the chemical structure,fluorescence properties,and thermal stability of Sm[CHA(PEG)].The results show that the UV absorption of Sm[CHA(PEG)]polymer light conversion agent showed broadband absorption at 320～400 nm,and the optimum peak of its fluorescence excitation peak is located at 362 nm,which is in agreement;the positions of fluorescence emission peaks is at 566 nm,614 nm,and 645 nm,among which the emission peak at 645 nm has the highest intensity,which is suitable for the absorption spectra of pho-tosynthesis of plants in the red-light region.The intensity of the emission peak at 645 nm is the highest,which matches the absorption spectrum of photosynthesis in the red light region.The heat loss curve shows that the decomposition temperature of the light conversion agent is 281 ℃,and the thermal stability is good.In summary,the synthesized Sm[CHA(PEG)]polymer light conversion agent has excellent optical and thermal properties,and it has great application prospect in the field of agricultural film.
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