Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions

The separation and recovery of noble metals is increasingly of interest, in particular the recovery of gold nanocrystals, which have applications in medicine and industry. Typically, metal recovery is performed using liquid–liquid extraction or electrowinning. However, it is necessary to develop nob...

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Autores principales:	Kin-ya Tomizaki, Tatsuki Tonoda, Shungo Teramura, Haruka Okazaki, Takahito Imai, Masahiro Asano
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	peptide self-assembly noble metal recovery gold platinum anthracene Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/3126321978de4249a19c8197d2d99569
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spelling	oai:doaj.org-article:3126321978de4249a19c8197d2d995692021-11-25T18:51:26ZMiniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions10.3390/pr91120102227-9717https://doaj.org/article/3126321978de4249a19c8197d2d995692021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/2010https://doaj.org/toc/2227-9717The separation and recovery of noble metals is increasingly of interest, in particular the recovery of gold nanocrystals, which have applications in medicine and industry. Typically, metal recovery is performed using liquid–liquid extraction or electrowinning. However, it is necessary to develop noble metal recovery systems providing high selectivity in conjunction with a one-pot setup, ready product recovery, and the use of dilute aqueous solutions. In prior work, our group developed a selective gold recovery process using peptides. This previous research showed that RU065, a nonapeptide containing an anthracene moiety (at a concentration of 2.0 × 10<sup>−4</sup> M), is capable of selective reduction of HAuCl<sub>4</sub> to recover gold from a solution of HAuCl<sub>4</sub> and H<sub>2</sub>PtCl<sub>6</sub>, each at 5.0 × 10<sup>−5</sup> M. However, peptide molecules are generally costly to synthesize, and therefore it is important to determine the minimum required structural features to design non-peptide anthracene derivatives that could reduce operational costs. In this study, we used RU065 together with 23 of its fragment peptides and investigated the selective precipitation/recovery of metallic gold. RU065<sub>4–8</sub>, a fragment peptide comprising five amino acid residues (having two lysine, one L-isoleusine, and one L-alanine residue (representing six amide groups) along with an L-2-anthrylalanine residue) provided an Au/Pt atomic ratio of approximately 8, which was comparable to that for the full-length original RU065. The structural features identified in this study are expected to contribute to the design of non-peptide anthracene derivatives for low-cost, one-pot selective gold recovery.Kin-ya TomizakiTatsuki TonodaShungo TeramuraHaruka OkazakiTakahito ImaiMasahiro AsanoMDPI AGarticlepeptideself-assemblynoble metal recoverygoldplatinumanthraceneChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 2010, p 2010 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	peptide self-assembly noble metal recovery gold platinum anthracene Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	peptide self-assembly noble metal recovery gold platinum anthracene Chemical technology TP1-1185 Chemistry QD1-999 Kin-ya Tomizaki Tatsuki Tonoda Shungo Teramura Haruka Okazaki Takahito Imai Masahiro Asano Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions
description	The separation and recovery of noble metals is increasingly of interest, in particular the recovery of gold nanocrystals, which have applications in medicine and industry. Typically, metal recovery is performed using liquid–liquid extraction or electrowinning. However, it is necessary to develop noble metal recovery systems providing high selectivity in conjunction with a one-pot setup, ready product recovery, and the use of dilute aqueous solutions. In prior work, our group developed a selective gold recovery process using peptides. This previous research showed that RU065, a nonapeptide containing an anthracene moiety (at a concentration of 2.0 × 10<sup>−4</sup> M), is capable of selective reduction of HAuCl<sub>4</sub> to recover gold from a solution of HAuCl<sub>4</sub> and H<sub>2</sub>PtCl<sub>6</sub>, each at 5.0 × 10<sup>−5</sup> M. However, peptide molecules are generally costly to synthesize, and therefore it is important to determine the minimum required structural features to design non-peptide anthracene derivatives that could reduce operational costs. In this study, we used RU065 together with 23 of its fragment peptides and investigated the selective precipitation/recovery of metallic gold. RU065<sub>4–8</sub>, a fragment peptide comprising five amino acid residues (having two lysine, one L-isoleusine, and one L-alanine residue (representing six amide groups) along with an L-2-anthrylalanine residue) provided an Au/Pt atomic ratio of approximately 8, which was comparable to that for the full-length original RU065. The structural features identified in this study are expected to contribute to the design of non-peptide anthracene derivatives for low-cost, one-pot selective gold recovery.
format	article
author	Kin-ya Tomizaki Tatsuki Tonoda Shungo Teramura Haruka Okazaki Takahito Imai Masahiro Asano
author_facet	Kin-ya Tomizaki Tatsuki Tonoda Shungo Teramura Haruka Okazaki Takahito Imai Masahiro Asano
author_sort	Kin-ya Tomizaki
title	Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions
title_short	Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions
title_full	Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions
title_fullStr	Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions
title_full_unstemmed	Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions
title_sort	miniaturization of anthracene-containing nonapeptides for selective precipitation/recovery of metallic gold from aqueous solutions containing gold and platinum ions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3126321978de4249a19c8197d2d99569
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Miniaturization of Anthracene-Containing Nonapeptides for Selective Precipitation/Recovery of Metallic Gold from Aqueous Solutions Containing Gold and Platinum Ions

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