| 2,1,3-benzothiadiazole(BTD)as an organic chromophore possess several desirable natures,including strong electron-withdrawing capacity,high electron affinity and architectural flexibility.Elaborately designed molecular BTD derivatives are appropriately used for nonlinear optical materials,fluorescent probes,solar energy conversion,electroluminescent materials and other applications.Based on the excellent optical properties of the BTD moieties,this thesis shows that the design and synthesis of new organic compounds and MOFs will play important roles in different areas,including third-order nonlinear optics,fluorescent bioprobe and crystalline photo-induced reactions.This thesis contains four parts as follow:1)The new BTD-based molecules quasi-D-A 2-1 and the relatively rigid derivative 2-2 were designed and prepared,which showed the interesting cubic NLO behavior,especially negative Re(?)capabilities.Furthermore,the external metal ion can effect for their cubic NLO performances.2)Two new BTD derivatives 3-1 and 3-2 were designed and obtained,which showed the distinctly pH-sensitive capabilities in broad response range.In a designed ratiometric method,probe 3-1 was explored as a quantitatively imaging detector of mitochondrial pH.This is the first example for quantitatively intracellular pH probe dependent on mitochondrial function under different physiological pH conditions.3)Two new Zn(II)BTD-derived MOFs,ZBT-M1 and ZBT-M2,were synthesized.Both ZBT-M1 and ZBT-M2 showed the crystalline-to-crystalline transformations in the unique photochemical decarboxylation processes.This first exploration for the micro-adjustment of MOF structure by simple photochemical reaction.4)One new porous Cd(II)-MOF was synthesized by the same ligand H2 BTDC.Moreover,two new graphene/MOF composites with different morphologies,GO-MOF-1 and GO-MOF-2,were prepared by modudation of basic synthetic conditions,which were further explored for the adsorption of organic dyes. |
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