Aggregation induced emission behavior in oleylamine acetone system and its application to get improved photocurrent from In2S3 quantum dots

Abstract

Blue emission giving nanoscale molecular clusters of Oleylamine–Acetone system was formed by an aging assisted hydrogen bond formation between the interacting molecular systems, at room temperature. The as-formed nanoscale molecular clusters were found to be self-assembled into flower-like aggregates and shifted the emission wavelength to red colour depicting an exciton delocalization in the aggregate system. Interestingly aging process has also produced imine type binding between Oleylamine and Acetone due to the condensation reaction. The experimental conditions and formation mechanism of hydrogen bond assisted Oleylamine–Acetone molecular aggregates and imine bond assisted Oleylamine–Acetone is elaborated in this paper in a systematic experimental approach with suitable theory. Finally we have introduced this Acetone assisted aging process in In2S3 QD system prepared with Oleylamine as functional molecules. It was found that the aging process has detached Oleylamine from QD surface and as a consequence In2S3 QD embedded Oleylamine–Acetone aggregates was obtained. When this In2S3 QD embedded molecular cluster system was used as an active layer in a photo conductor device then a maximum photo current value of the order of milli Ampere was obtained. The surfactant molecules normally inhibit the charge transport between QD systems and as a result it is always problematic to have the functional molecules in the QD based transport devices. Our approach has a solution to this problem and the present paper discusses the outcome of the results in detail.

Grafting Behavior of Amine Ligands for Surface Modification of MXene

“…By contrast, OAm-MX exhibited characteristic peaks corresponding to the chemical composition of OAm. Peaks corresponding to δ­(C–N), δ­(CH 3 ), δ­(N–H), δ­(−CC), ν s (C–H), ν as (C–H), and ν­(C–H) were observed at 1100, 1464, 1620, 1651, 2852, 2920, and 3005 cm –1 , respectively. − This indicates that the MXene surface was efficiently modified with OAms through liquid-interface reactions. Moreover, the broad bands of −OH stretching for OAm-MX were smaller than those for pristine MXene, indicating H bonding between the amine group in the OAm and various functional groups on the MXene nanosheets…”

Induced UV photon sensing properties in narrow bandgap CdTe quantum dots through controlling hot electron dynamics

“…37 During the formation of QD solids, the chances of developing electron trap states at the interface between the QDs are high, which then will influence the charge transport in the QD solids. 38,39 Various synthesis methods have been used to synthesize QD solids such as the epitaxial method, 40 QD solid deposition as a film, 41 solution process techniques, 42 etc. In the solution process method, QD solid formation take places either by replacing the large ligand molecule with short chain molecules/atoms through ligand exchange or using a short chain ligand for surface passivation.…”

Biomimetic Bacterium-like Particles Loaded with Aggregation-Induced Emission Photosensitizers as Plasma Coatings for Implant-Associated Infections

“…43 The typical chemical functional groups of AIE PSs include nitrile groups at 2354 cm −1 , N−H bending at 1584 cm −1 , and aromatic rings at 1483 cm −1 , in agreement with previous literature. 44 The infrared peak at 828 cm −1 in the fingerprint region is due to the presence of PF 6 groups. 45 The unique bacterial FTIR spectral windows show mainly lipids (around 2800−3000 cm −1 ), proteins and peptides (1500− 1800 cm −1 ), DNA and phospholipids (1200−1400 cm −1 ), and polysaccharides (900−1200 cm −1 ).…”