A Novel Proton Sensor with Luminescence and Color Signaling Based on Platinum(II) Terpyridyl Acetylide Complex

Molecular switches that are controllable, reversible and readable at molecular level are an essential compo-nent of molecular electronics1 and chemical sensors.2-6 Of particular interest are the molecules which show dramatic and reversible changes in color and/or lumi-nescence in visible spectral region upon exposure to specific substrates. A number of chromophore- spacer-receptor systems that can selectively recognize specific guest molecules at their receptor site and pro-duce measurable col…     

4-(4-甲基苯基)-6-苯基-2,2′-二联吡啶芳炔铂(II)络合物的合成及光物理性质

设计合成以4-甲基苯基-6-苯基-2,2′-二联吡啶为主配体、芳炔为辅助配体的铂(II)络合物1-3.与苯乙炔、萘乙炔为辅助配体的络合物1,2相比,蒽乙炔4-(4-甲基苯基)-6-苯基-2,2′-二联吡啶铂(II)络合物MLCT激发态的能量升高.     

Tuning the Excited—state Properties of Cyclometalated Platinum（Ⅱ）Complexes of 6—Pheny1—2,2’bipyridine by Ancillary Acetylide Ligand

A series of luminescent cyclometalated platinum(Ⅱ）complexes,(C^N^N)Pt(C≡CR)[HC^N^N=4-(4-tolyl)-6-phenyl-2,2’-bipyridine;R=4-chlorophenyl(1),phenyl(2) and 4-tolyl(3)],were synthesized,and their spectroscopic properties have been examined.These complexes are brightly emissive both in fluid solution and in the solid state,attributed to triplet metal-to-ligand charge transfer(^3MLCT)state.The excited state energy can be tuned by ancillary acetylide ligands.The emission lifetimes in dichloromethand solution at room temperature were up to 1.64 μs and the emission quantum yields were in the range of 0.03-0.15.     

Tuning the Excited-state Properties of Cyclometalated Platinum(II) Complexes of 6-Phenyl-2,2′-bipyridine by Ancillary Acetylide Ligand

Luminescentcoordinativelyunsaturatedmetalcomplexesareappealingfromphotochemicalandphotophysicalperspec tive.1,2 Square planarplatinum(II)complexescontainingachelatingdiimineligandrepresentapromisingclassofthesemolecules.2 However,theyareusuallyweakemittersorevennonemissiveinfluidsolutionatroomtemperatureduetoaD2ddistortion .3Therefore ,manyresearchershavedivertedtheirattentiontothetridentateligand ,whichfavorsplanargeometryandwoulddiscourageaD2ddistortion .Inparticu lar,platinum(II)complexe…