Universität zu Köln

Jordan, Jack W., Chernov, Alexander, I, Rance, Graham A., Davies, E. Stephen, Lanterna, Anabel E., Fernandes, Jesum Alves, Gruneis, Alexander ORCID: 0000-0003-2448-6060, Ramasse, Quentin ORCID: 0000-0001-7466-2283, Newton, Graham N. ORCID: 0000-0003-2246-4466 and Khlobystov, Andrei N. (2023). Host-Guest Chemistry in Boron Nitride Nanotubes: Interactions with Polyoxometalates and Mechanism of Encapsulation. J. Am. Chem. Soc., 145 (2). S. 1206 - 1216. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-5126

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Abstract

Boron nitride nanotubes (BNNTs) are an emerging class of molecular container offering new functionalities and possibilities for studying molecules at the nanoscale. Herein, BNNTs are demonstrated as highly effective nanocontainers for polyoxometalate (POM) molecules. The encapsulation of POMs within BNNTs occurs spontaneously at room temperature from an aqueous solution, leading to the self-assembly of a POM@BNNT host-guest system. Analysis of the interactions between the hostnanotube and guest-molecule indicate that Lewis acid-base interactions between W=O groups of the POM (base) and B atoms of the BNNT lattice (acid) likely play a major role in driving POM encapsulation, with photoactivated electron transfer from BNNTs to POMs in solution also contributing to the process. The transparent nature of the BNNT nanocontainer allows extensive investigation of the guest-molecules by photoluminescence, Raman, UV-vis absorption, and EPR spectroscopies. These studies revealed considerable energy and electron transfer processes between BNNTs and POMs, likely mediated via defect energy states of the BNNTs and resulting in the quenching of BNNT photoluminescence at room temperature, the emergence of new photoluminescence emissions at cryogenic temperatures (<100 K), a photochromic response, and paramagnetic signals from guest-POMs. These phenomena offer a fresh perspective on host-guest interactions at the nanoscale and open pathways for harvesting the functional properties of these hybrid systems.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Jordan, Jack W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chernov, Alexander, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Rance, Graham A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Davies, E. Stephen UNSPECIFIED UNSPECIFIED UNSPECIFIED Lanterna, Anabel E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fernandes, Jesum Alves UNSPECIFIED UNSPECIFIED UNSPECIFIED Gruneis, Alexander UNSPECIFIED orcid.org/0000-0003-2448-6060 UNSPECIFIED Ramasse, Quentin UNSPECIFIED orcid.org/0000-0001-7466-2283 UNSPECIFIED Newton, Graham N. UNSPECIFIED orcid.org/0000-0003-2246-4466 UNSPECIFIED Khlobystov, Andrei N. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-680787
DOI:	10.1021/jacs.2c10961
Journal or Publication Title:	J. Am. Chem. Soc.
Volume:	145
Number:	2
Page Range:	S. 1206 - 1216
Date:	2023
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1520-5126
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHEMICAL-REACTIONS; MOLECULES; STABILITY; NANORODS Multiple languages Chemistry, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68078