title: J-aggregation of a sulfur-substituted naphthalenediimide (NDI) with remarkably bright fluorescence.
abstract: This communication reveals the H-bonding driven supramolecular assembly of a sulfur-substituted naphthalenediimide leading to the formation of very strong (Tg > 90 °C) organogel in aliphatic hydrocarbons. Mechanistic investigation reveals nucleation-elongation pathway for self-assembly. Photophysical studies show explicit features of classical J-aggregation which reduces the non-radiative fluorescence rate constant considerably and thus results in a remarkable fluorescence enhancement (ΦPL increases from 1% to 30%) which is unprecedented in the entire NDI literature.
authors.affiliation: Polymer Science Unit, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India. psusg2@iacs.res.in.
authors.forename: Haridas
authors.initials: H
authors.lastname: Kar
authors.affiliation: Polymer Science Unit, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India. psusg2@iacs.res.in.
authors.forename: Suhrit
authors.initials: S
authors.lastname: Ghosh