%0 Journal Article %A Alam, Parvej %A Kaur, Gurpreet %A Sarmah, Amrit %A Roy, Ram Kinkar %A Choudhury, Angshuman Roy %A Laskar, Inamur Rahaman %D 2015 %T Highly Selective Detection of H+ and OH with a Single-Emissive Iridium(III) Complex: A Mild Approach to Conversion of Non-AIEE to AIEE Complex %U https://acs.figshare.com/articles/journal_contribution/Highly_Selective_Detection_of_H_sup_sup_and_OH_sup_sup_with_a_Single_Emissive_Iridium_III_Complex_A_Mild_Approach_to_Conversion_of_Non_AIEE_to_AIEE_Complex/2127742 %R 10.1021/acs.organomet.5b00447.s003 %2 https://acs.figshare.com/ndownloader/files/3761545 %K Conversion %K aspect %K ligand %K octahedral %K OH %K Mild %K mode %K detection %K Complex %K acid %K Detection %K Selective %K acidic %K 2ppy %K ability %K emissive %K ComplexA %K presence %K amine %K Approach %K medium %K DFT %K emission %K Iridium %K hydroxide ion %K iridium %K 1. %K nM %K calculation %K difluoro %K AIE %K rotor %K mechanism %K nonchelating %K AIEE %K Ir %X A greenish-blue emissive bis-cyclometalated iridium­(III) complex with octahedral geometry was synthesized in a convenient route where a bulky substituted ligand, N1-tritylethane-1,2-diamine ligand (trityl-based rotating unit) (L1), was coordinated to iridium­(III) in nonchelating mode, [Ir­(F2ppy)2(L1)­(Cl)], [F2ppy = 2-(2′,4′-difluoro)­phenylpyridine; L1 = N1-tritylethane-1,2-diamine], 1. The purpose of introducing a rotor in 1 was anticipated to initiate aggregation-induced emission (AIE) activity in it. The presence of a secondary amine in L1 has attributed to 1 the ability to sense acids. The mechanism of this change in 1 under acidic medium was explored. A bright yellow emissive complex was formed on exposing 1 to hydroxide ion, which was isolated, characterized, and identified as a new aggregation-induced enhanced emission (AIEE) active complex. The detection limit of hydroxide ion was determined to 126 nM. Ground- and excited-state properties of 1 were investigated using DFT- and TD-DFT-based calculations, and several important aspects of the experimental facts were validated. %I ACS Publications