title: Induced Aggregation of AIE-Active Mono-Cyclometalated Ir(III) Complex into Supramolecular Branched Wires for Light-Emitting Diodes.
abstract: Aggregation-induced emission (AIE) is commonly observed in irregular bulk form. Herein, unique aggregation properties of an AIE-active complex into branched supramolecular wires are reported for the first time. Mono-cyclometalated Ir(III) complex shows in-plane J-aggregation at the air-water interface owing to the restriction of intramolecular vibration of bidentate phenylpyridinato and intramolecular rotations of monodentate triphenylphosphine ligands at air-water interface. As a consequence, a large enhancement of luminescence comparable to the solid state is obtained from the monolayers of supramolecular wires. This unique feature is utilized for the fabrication of light-emitting diodes with low threshold voltage using supramolecular wires as active layer. This study opens up the need of ordered assembly of AIE complexes to achieve optimal luminescence characteristics.
authors.affiliation: Centre for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Subrata
authors.initials: S
authors.lastname: Maji
authors.affiliation: Department of Chemistry, Birla Institute of Technology and Science (BITS), Pilani, Rajasthan, 333031, India.
authors.forename: Parvej
authors.initials: P
authors.lastname: Alam
authors.affiliation: Centre for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Gundam Sandeep
authors.initials: GS
authors.lastname: Kumar
authors.affiliation: Centre for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Sandip
authors.initials: S
authors.lastname: Biswas
authors.affiliation: Centre for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Piyush Kanti
authors.initials: PK
authors.lastname: Sarkar
authors.affiliation: Centre for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Bidisa
authors.initials: B
authors.lastname: Das
authors.affiliation: Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Ishita
authors.initials: I
authors.lastname: Rehman
authors.affiliation: Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Benu Brata
authors.initials: BB
authors.lastname: Das
authors.affiliation: Centre for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Nikhil Ranjan
authors.initials: NR
authors.lastname: Jana
authors.affiliation: Department of Chemistry, Birla Institute of Technology and Science (BITS), Pilani, Rajasthan, 333031, India.
authors.forename: Inamur Rahaman
authors.initials: IR
authors.lastname: Laskar
authors.affiliation: Centre for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
authors.forename: Somobrata
authors.initials: S
authors.lastname: Acharya
keywords: J-aggregation; aggregation-induced emission; light-emitting diodes; monolayer; supramolecular wires