Tuning the Au–Au interactions by varying the degree of polymerisation in linear polymeric Au(i) N-heterocyclic carbene complexes

Sathyanarayana, Arruri and Siddhant, Kumar and Prabusankar, G and et al, . (2022) Tuning the Au–Au interactions by varying the degree of polymerisation in linear polymeric Au(i) N-heterocyclic carbene complexes. Journal of Materials Chemistry C, 10 (15). pp. 6050-6060. ISSN 2050-7526

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Gold(i) N-heterocyclic carbene (Au(i) NHC) polymers were successfully synthesised with alkyl and alkoxy spacers, wherein polymers with different degrees of polymerisation were isolated for the first time by varying the reaction time. The structure-property relationships of the newly synthesised luminescent Au(i) NHC polymeric complexes were examined from the viewpoint of material applications. In particular, we investigated the effect of controlling the Au-Au interactions by varying the degree of polymerisation and introducing spacers into the complexes. An emission study of the polymers suggested that increasing the degree of polymerisation decreases the number of Au-Au interactions. The structures of the molecular aggregates were affected by the degree of polymerisation as well as the spacer between the two carbenes, and all complexes exhibited a high thermal stability (>300 °C). Moreover, we found that the polymer bearing an alkoxy spacer and with a low degree of polymerisation exhibited white room-temperature phosphorescence, thereby indicating that the luminescence behaviour depends mainly on the molecular aggregate structure. These results suggest that various material properties, such as the luminescence colour and thermal stability, can be controlled independently by tuning the structures of molecules and molecular aggregates using alkyl/alkoxy spacers with different degrees of polymerisation. © 2022 The Royal Society of Chemistry.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Additional Information: The authors acknowledge financial support from the Japan-India Science Cooperative Program between JSPS and DST (JPJSBP120217716), JSPS KAKENHI (20K15249 for KH), and the Cooperative Research Program of the Network Joint Research Centre for Materials and Devices.
Uncontrolled Keywords: Carbenes; Degrees of polymerizations; High thermal stability; Material application; Molecular aggregate; N-heterocyclic carbene complex; N-heterocyclic carbenes; Polymeric complex; Structure-properties relationships; Synthesised
Subjects: Chemistry
Chemistry > Techniques, procedures, apparatus, equipment, materials
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 22 Jul 2022 06:56
Last Modified: 22 Jul 2022 06:56
URI: http://raiith.iith.ac.in/id/eprint/9537
Publisher URL: http://doi.org/10.1039/d2tc00534d
OA policy: https://v2.sherpa.ac.uk/id/publication/25610
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