TY - JOUR

T1 - Deposition of Nanosized Amino Acid Functionalized Bismuth Oxido Clusters on Gold Surfaces

AU - Morgenstern, Annika

AU - Thomas, Rico

AU - Sharma, Apoorva

AU - Weber, Marcus

AU - Selyshchev, Oleksandr

AU - Milekhin, Ilya

AU - Dentel, Doreen

AU - Gemming, Sibylle

AU - Tegenkamp, Christoph

AU - Zahn, Dietrich R T

AU - Mehring, Michael

AU - Salvan, Georgeta

N1 - Funding: A.S. and G.S. would like to acknowledge financial support from DFG project no. 282193534. The publication of this article was funded by Chemnitz University of Technology and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—491193532. SG acknowledges support by the Deutsche Forschungsgemeinschaft via project INST 270/290-1 FUGB.

PY - 2022/5/26

Y1 - 2022/5/26

N2 - Bismuth compounds are of growing interest with regard to potential applications in catalysis, medicine, and electronics, for which their environmentally benign nature is one of the key factors. One thing that currently hampers the further development of bismuth oxido-based materials, however, is the often low solubility of the precursors, which makes targeted immobilisation on substrates challenging. We present an approach towards the solubilisation of bismuth oxido clusters by introducing an amino carboxylate as a functional group. For this purpose, the bismuth oxido cluster [Bi38O45(NO3)20(dmso)28](NO3)4·4dmso (dmso = dimethyl sulfoxide) was reacted with the sodium salt of tert-butyloxycabonyl (Boc)-protected phenylalanine (L-Phe) to obtain the soluble and chiral nanocluster [Bi38O45(Boc-Phe-O)24(dmso)9]. The exchange of the nitrates by the amino carboxylates was proven by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, as well as elemental analysis and X-ray photoemission spectroscopy. The solubility of the bismuth oxido cluster in a protic as well as an aprotic polar organic solvent and the growth mode of the clusters upon spin, dip, and drop coating on gold surfaces were studied by a variety of microscopy, as well as spectroscopic techniques. In all cases, the bismuth oxido clusters form crystalline agglomerations with size, height, and distribution on the substrate that can be controlled by the choice of the solvent and of the deposition method.

AB - Bismuth compounds are of growing interest with regard to potential applications in catalysis, medicine, and electronics, for which their environmentally benign nature is one of the key factors. One thing that currently hampers the further development of bismuth oxido-based materials, however, is the often low solubility of the precursors, which makes targeted immobilisation on substrates challenging. We present an approach towards the solubilisation of bismuth oxido clusters by introducing an amino carboxylate as a functional group. For this purpose, the bismuth oxido cluster [Bi38O45(NO3)20(dmso)28](NO3)4·4dmso (dmso = dimethyl sulfoxide) was reacted with the sodium salt of tert-butyloxycabonyl (Boc)-protected phenylalanine (L-Phe) to obtain the soluble and chiral nanocluster [Bi38O45(Boc-Phe-O)24(dmso)9]. The exchange of the nitrates by the amino carboxylates was proven by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, as well as elemental analysis and X-ray photoemission spectroscopy. The solubility of the bismuth oxido cluster in a protic as well as an aprotic polar organic solvent and the growth mode of the clusters upon spin, dip, and drop coating on gold surfaces were studied by a variety of microscopy, as well as spectroscopic techniques. In all cases, the bismuth oxido clusters form crystalline agglomerations with size, height, and distribution on the substrate that can be controlled by the choice of the solvent and of the deposition method.

KW - AFM

KW - Boc-protected amino acid functionalized chiral bismuth oxido nanocluster

KW - FTIR

KW - SEM

KW - XPS

KW - dip coating

KW - drop coating

KW - film growth mechanisms

KW - optical microscopy

KW - spin coating

UR - https://www.mendeley.com/catalogue/ca64a737-8c68-3433-8aa1-f55f38b4b101/

U2 - 10.3390/nano12111815

DO - 10.3390/nano12111815

M3 - Article

C2 - 35683672

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 11

M1 - 1815

ER -