title: Differentiating phosphates by an Mg(2+) complex of the conjugate of calix[4]arene via the formation of ternary species and causing changes in the aggregation: spectroscopy, microscopy, and computational modeling.
abstract: A phenylene diimine capped conjugate of 1,3-calix[4]arene (L) was synthesized and characterized, and its Mg(2+) complex has been isolated and characterized. The chemo sensing ensemble of Mg(2+) bound L provides distinguishable features of response toward phosphates, viz., HPO4(2-), P2O7(4-), and AMP(2-) (Set A) and H2PO4(-), ATP(2-), and ADP(2-) (Set B). While the Set A shows the formation of ternary complex, the Set B does not exhibit any intermediate complex, but both show the release of Mg(2+) and L at different equivalents. The structures of {L + Mg(2+)} and its phosphate bound ternary complexes have been established by computational calculations, and the corresponding results agree well with the experimental ones. The microscopy studies show an aggregation-disaggregation phenomenon in the presence of different equivalents of phosphates in both of the sets. Using the fluorescence data, an INHIBIT logic gate has been built.
authors: Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai, Maharashtra 400076, India.
authors: Anita
authors: A
authors: Nehra
authors: Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai, Maharashtra 400076, India.
authors: Deepthi S
authors: DS
authors: Yarramala
authors: Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai, Maharashtra 400076, India.
authors: Vijaya Kumar
authors: VK
authors: Hinge
authors: Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai, Maharashtra 400076, India.
authors: Kushal
authors: K
authors: Samanta
authors: Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai, Maharashtra 400076, India.
authors: Chebrolu Pulla
authors: CP
authors: Rao
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D008853:Microscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D010710:Phosphates / Q000032:analysis* / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D009942:Organometallic Compounds; D010636:Phenols; D010710:Phosphates; C121325:calix(4)arene; D047250:Calixarenes; D008274:Magnesium