Preparation And Photoelectric Properties Of Composites Constructed Of Dyes And Coordination Polymers Based On A Flexible Ligand N~1,N~4-Bis(5-fluoropyridin-3-yl) Succinamide

Coordination polymers?CPs?own a variety of structures and may composite with dyes via electrostatic interactions,hydrogen bonding interactions,?–?stacking and ion-exchange.Organic dyes are capable of capturing sunlight and have been widely employed in the fields including the dye-sensitized solar cells and the chemiluminescent sensors.Therefore,many attentions are drawn in the preparation of composites of CPs and organic dyes as well as their photoelectric properties recently.In this thesis,we constructed aseriesofCPsbytheassemblyofflexibledipyridylligand N¹,N⁴-bis?5-fluoropyridin-3-yl?succinamide?bfps?with Zn?II?and Ag?I?,we carried out adsorption experiments of these CPs toward dyes in water and explored the photoelectronic properties of the composites.The detailed results are described as follows:1.Solvothermal reaction of bfps with AgNO₃ afforded a 1D Ag?I?-based coordination polymer{[Ag?bfps?]NO₃}_n?1?.Compound 1 contains a cationic chain,which exhibited excellent absorption performance toward the anionic azo dye Orange II?NaOII?via an anion-exchange process with a maximum capacity of 662 mg?g^-1.Two composites{[Ag?bfps?]?NO₃?_0.85?OII?_0.15}_n?2?and{[Ag?bfps?]?NO₃?_0.1?OII?_0.9}_n?3?with different molar ratios of 1 and OII were isolated and both exhibited enhanced photocurrent responses and improved dielectric properties.2.Solvothermal reactions of bfps with Zn?OAc?₂ and 1,2,3-H₃BTC and 1,3,5-H₃BTC producedtwoCPs{[Zn₃?bfps??1,2,3-BTC?₂?H₂O?₆]·4H₂O}_n?5·4H₂O?and{[Zn?bfps??1,3,5-HBTC?]·H₂O}_n?6·H₂O?.Compounds 5·4H₂O and 6·H₂O showed superior absorption performances toward Orange IV with maximum capacities of 718 and794 mg g^-1,respectively.Composites 7?5·2.0OIV?and 8?6·1.1OIV·2.5H₂O?exhibited enhanced photocurrent responses and varied dielectric properties compared to compounds5·4H₂O and 6·H₂O.