10.1021/acs.organomet.5b00447.s003
Parvej Alam
Parvej
Alam
Gurpreet Kaur
Gurpreet
Kaur
Amrit Sarmah
Amrit
Sarmah
Ram Kinkar Roy
Ram Kinkar
Roy
Angshuman
Roy Choudhury
Angshuman
Roy
Choudhury
Inamur Rahaman Laskar
Inamur Rahaman
Laskar
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
American Chemical Society
2015
Conversion
aspect
ligand
octahedral
OH
Mild
mode
detection
Complex
acid
Detection
Selective
acidic
2ppy
ability
emissive
ComplexA
presence
amine
Approach
medium
DFT
emission
Iridium
hydroxide ion
iridium
1.
nM
calculation
difluoro
AIE
rotor
mechanism
nonchelating
AIEE
Ir
2015-09-28 00:00:00
Journal contribution
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
A greenish-blue emissive bis-cyclometalated
iridium(III) complex
with octahedral geometry was synthesized in a convenient route where
a bulky substituted ligand, <i>N</i><sup>1</sup><b>-</b>tritylethane-1,2-diamine ligand (trityl-based rotating unit) (<b>L</b><sub><b>1</b></sub>), was coordinated to iridium(III)
in nonchelating mode, [Ir(F<sub>2</sub>ppy)<sub>2</sub>(L<sub>1</sub>)(Cl)], [F<sub>2</sub>ppy = 2-(2′,4′-difluoro)phenylpyridine; <b>L</b><sub><b>1</b></sub> = <i>N</i><sup>1</sup>-tritylethane-1,2-diamine], <b>1</b>. The purpose of introducing
a rotor in <b>1</b> was anticipated to initiate aggregation-induced
emission (AIE) activity in it. The presence of a secondary amine in <b>L</b><sub><b>1</b></sub> has attributed to <b>1</b> the ability to sense acids. The mechanism of this change in <b>1</b> under acidic medium was explored. A bright yellow emissive
complex was formed on exposing <b>1</b> 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 <b>1</b> were investigated using DFT- and TD-DFT-based calculations,
and several important aspects of the experimental facts were validated.