Self-assembly study of nanometric spheres from polyoxometalate-phenylalanine hybrids, an experimental and theoretical approach

被引：28

作者：

Nikoloudakis, Emmanouil ^{[1
]}

Karikis, Kostas ^{[1
]}

Laurans, Maxime ^{[2
]}

Kokotidou, Chrysoula ^{[3
,4
]}

Sole-Daura, Albert ^{[5
]}

Carbo, Jorge J. ^{[5
]}

Charisiadis, Asterios ^{[1
]}

Charalambidis, Georgios ^{[1
]}

Izzet, Guillaume ^{[2
]}

Mitraki, Anna ^{[3
,4
]}

Douvas, Antonios M. ^{[6
]}

Poblet, Josep M. ^{[5
]}

Proust, Anna ^{[2
]}

Coutsolelos, Athanassios G. ^{[1
]}

机构：

[1] Univ Crete, Lab BioInorg Chem, Dept Chem, Voutes Campus, Iraklion 70013, Crete, Greece

[2] Sorbonne Univ, CNRS, UMR 8232, IPCM, 4 Pl Jussieu, F-75005 Paris, France

[3] Univ Crete, Dept Mat Sci & Technol, Iraklion 70013, Crete, Greece

[4] Fdn Res & Technol Hellas FORTH, IESL, Iraklion 70013, Crete, Greece

[5] Univ Rovira & Virgili, Dept Quim Fis & Inorgan, Marcel Li Domingo 1, E-43007 Tarragona, Spain

[6] NCSR, INN, Demokritos Patr Gregoriou E & 27,Neapoleos Str, Aghia Paraskevi 15341, Attica, Greece

来源：

DALTON TRANSACTIONS | 2018年 / 47卷 / 18期

关键词：

MOLECULAR-ORBITAL METHODS; CORRELATION-ENERGY; KEGGIN ANIONS; DYNAMICS; FORCE; COMPLEX; DRIVEN; APPROXIMATION; MICROSPHERES; AGGREGATION;

D O I：

10.1039/c8dt00380g

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Herein, we report on the study of supramolecular assemblies based on polyoxometalates (POMs) upon their modification with amino acids. Two POM-amino acid hybrids were synthesized by coupling a functionalized Keggin type polyoxoanion IPVV 0 {Sn(C6H.4)CC(C61-1,)COOH)J2--- with carboxyl-protected- 39 (methyl-ester) phenylalanine or diphenylalanine peptides. Surprisingly, all compounds, including the initial POM, formed supramolecular nanospheres in different solvent mixtures, which were examined by scanning electron microscopy (SEM). Molecular dynamics (MD) simulations for the POM-amino acid species revealed that the hydrophobic forces are mainly responsible for the initial aggregation into incipient micelle type structures, in which the organic arms are buried inside the aggregate while POM polar heads are more exposed to the solvent with tetrabutyl-ammonium counter cations acting as linkers.

引用

页码：6304 / 6313

页数：10

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