Ruthenium polypyridyl complexes are known for their excellent photophysical properties and rich electrochemical behavior.Thus,developing complexes with multifunctional behavior showing potential applications in multip...Ruthenium polypyridyl complexes are known for their excellent photophysical properties and rich electrochemical behavior.Thus,developing complexes with multifunctional behavior showing potential applications in multiple fields is of great importance.Herein,we report a new aggregation-induced emission(AIE)active bis-heteroleptic ruthenium(Ⅱ)complex(Ru-4)of 4,7-diamino 1,10-phenanthroline along with a series of other bis-heteroleptic Ru(Ⅱ)polypyridyl complexes(Ru-1,Ru-2 and Ru-3)containing 4,7-disubstituted 1,10-phenanthroline and two homoleptic complexes(Ru-5 and Ru-6)of 2,2’-bipyridine and 1,10-phenanthroline.展开更多
Two bis-heteroleptic ruthenium(II)complexes,1[PF_(6)]_(2)and 2[PF_(6)]_(2)of 4,7-dihydroxy-1,10-phenanthroline,have been developed for the highly selective‘light-up’detection of nerve agent simulant and organopho sp...Two bis-heteroleptic ruthenium(II)complexes,1[PF_(6)]_(2)and 2[PF_(6)]_(2)of 4,7-dihydroxy-1,10-phenanthroline,have been developed for the highly selective‘light-up’detection of nerve agent simulant and organopho sphate pesticide in aqueous solution.Both the complexes,1[PF_(6)]_(2)and 2[PF_(6)]_(2),were fully characterized by spectroscopic means and single-crystal X-ray diffraction studies.Compounds 1[PF_(6)]_(2)and 2[PF_(6)]_(2)show a selective turn-on luminescence response in the presence of nerve agent stimulant DCP over other com petitive nerve agent surrogates,acylating agents,HCl and pulmonary agent like phosgene.The detection of DCP was achieved via a nucleophilic attack of two hydroxyl groups of the 4,7-dihydroxy-1,10-phen anthroline ligand with DCP by forming bulkier phosphotriester and corresponding PL enhancement.The detection limit implies that 1[PF_(6)]_(2)and 2[PF_(6)]_(2)are able to detect DCP at the micromolar level.1 H NMR titration,31 P NMR and ESI-MS analysis collectively support the binding mechanism of phenolic hydroxyl groups of the ligand L with the PvO center of DCP.Triplet state TD-DFT calculations endorsed that the weak and strong red luminescence of 1 and 1-(DCP)2 originated from the non-emissive 3MC and emissive 3MLCT states,respectively.Also,probes 1[PF_(6)]_(2)and 2[PF_(6)]_(2)have been used for the highly selective luminescence detection of an organophosphate pesticide,dichlorvos,over the market available other organophosphorus pesticides(paraoxon-ethyl,parathion-ethyl,profenofos,and dimethoate).Furthermore,a test paper strip coated with complex 1 was fabricated to detect DCP in the vapor phase and dichlorvos in solution.Finally,probe 1 was successfully applied in biological studies to visualize DCP as well as dichlorvos in catfish brain tissue.展开更多
文摘Ruthenium polypyridyl complexes are known for their excellent photophysical properties and rich electrochemical behavior.Thus,developing complexes with multifunctional behavior showing potential applications in multiple fields is of great importance.Herein,we report a new aggregation-induced emission(AIE)active bis-heteroleptic ruthenium(Ⅱ)complex(Ru-4)of 4,7-diamino 1,10-phenanthroline along with a series of other bis-heteroleptic Ru(Ⅱ)polypyridyl complexes(Ru-1,Ru-2 and Ru-3)containing 4,7-disubstituted 1,10-phenanthroline and two homoleptic complexes(Ru-5 and Ru-6)of 2,2’-bipyridine and 1,10-phenanthroline.
基金supported by DST,India(No.SB/FT/CS-115/2012)DST-SPLICE,India(DST/CCP/HICAB/SN-Meghalaya/178/2018(G)).
文摘Two bis-heteroleptic ruthenium(II)complexes,1[PF_(6)]_(2)and 2[PF_(6)]_(2)of 4,7-dihydroxy-1,10-phenanthroline,have been developed for the highly selective‘light-up’detection of nerve agent simulant and organopho sphate pesticide in aqueous solution.Both the complexes,1[PF_(6)]_(2)and 2[PF_(6)]_(2),were fully characterized by spectroscopic means and single-crystal X-ray diffraction studies.Compounds 1[PF_(6)]_(2)and 2[PF_(6)]_(2)show a selective turn-on luminescence response in the presence of nerve agent stimulant DCP over other com petitive nerve agent surrogates,acylating agents,HCl and pulmonary agent like phosgene.The detection of DCP was achieved via a nucleophilic attack of two hydroxyl groups of the 4,7-dihydroxy-1,10-phen anthroline ligand with DCP by forming bulkier phosphotriester and corresponding PL enhancement.The detection limit implies that 1[PF_(6)]_(2)and 2[PF_(6)]_(2)are able to detect DCP at the micromolar level.1 H NMR titration,31 P NMR and ESI-MS analysis collectively support the binding mechanism of phenolic hydroxyl groups of the ligand L with the PvO center of DCP.Triplet state TD-DFT calculations endorsed that the weak and strong red luminescence of 1 and 1-(DCP)2 originated from the non-emissive 3MC and emissive 3MLCT states,respectively.Also,probes 1[PF_(6)]_(2)and 2[PF_(6)]_(2)have been used for the highly selective luminescence detection of an organophosphate pesticide,dichlorvos,over the market available other organophosphorus pesticides(paraoxon-ethyl,parathion-ethyl,profenofos,and dimethoate).Furthermore,a test paper strip coated with complex 1 was fabricated to detect DCP in the vapor phase and dichlorvos in solution.Finally,probe 1 was successfully applied in biological studies to visualize DCP as well as dichlorvos in catfish brain tissue.
