Design and synthesis of hydroxide ion-conductive metal-organic frameworks based on salt inclusion

Masaaki Sadakiyo; Hidetaka Kasai; Kenichi Kato; Masaki Takata; Miho Yamauchi

doi:10.1021/ja410368j

Design and synthesis of hydroxide ion-conductive metal-organic frameworks based on salt inclusion

Masaaki Sadakiyo, Hidetaka Kasai, Kenichi Kato, Masaki Takata, Miho Yamauchi

Research output: Contribution to journal › Article › peer-review

115 Citations (Scopus)

Abstract

We demonstrate a metal-organic framework (MOF) design for the inclusion of hydroxide ions. Salt inclusion method was applied to an alkaline-stable ZIF-8 (ZIF = zeolitic imidazolate framework) to introduce alkylammonium hydroxides as ionic carriers. We found that tetrabutylammonium salts are immobilized inside the pores by a hydrophobic interaction between the alkyl groups of the salt and the framework, which significantly increases the hydrophilicity of ZIF-8. Furthermore, ZIF-8 including the salt exhibited a capacity for OH^- ion exchange, implying that freely exchangeable OH^- ions are present in the MOF. ZIF-8 containing OH^- ions showed an ionic conductivity of 2.3 × 10^-8 S cm^-1 at 25 C, which is 4 orders of magnitude higher than that of the blank ZIF-8. This is the first example of an MOF-based hydroxide ion conductor.

Original language	English
Pages (from-to)	1702-1705
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	136
Issue number	5
DOIs	https://doi.org/10.1021/ja410368j
Publication status	Published - Feb 5 2014

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

Access to Document

10.1021/ja410368j

Cite this

@article{be440bed568046fc8f2e430c747540ea,

title = "Design and synthesis of hydroxide ion-conductive metal-organic frameworks based on salt inclusion",

abstract = "We demonstrate a metal-organic framework (MOF) design for the inclusion of hydroxide ions. Salt inclusion method was applied to an alkaline-stable ZIF-8 (ZIF = zeolitic imidazolate framework) to introduce alkylammonium hydroxides as ionic carriers. We found that tetrabutylammonium salts are immobilized inside the pores by a hydrophobic interaction between the alkyl groups of the salt and the framework, which significantly increases the hydrophilicity of ZIF-8. Furthermore, ZIF-8 including the salt exhibited a capacity for OH- ion exchange, implying that freely exchangeable OH- ions are present in the MOF. ZIF-8 containing OH- ions showed an ionic conductivity of 2.3 × 10-8 S cm-1 at 25 C, which is 4 orders of magnitude higher than that of the blank ZIF-8. This is the first example of an MOF-based hydroxide ion conductor.",

author = "Masaaki Sadakiyo and Hidetaka Kasai and Kenichi Kato and Masaki Takata and Miho Yamauchi",

year = "2014",

month = feb,

day = "5",

doi = "10.1021/ja410368j",

language = "English",

volume = "136",

pages = "1702--1705",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

T1 - Design and synthesis of hydroxide ion-conductive metal-organic frameworks based on salt inclusion

AU - Sadakiyo, Masaaki

AU - Kasai, Hidetaka

AU - Kato, Kenichi

AU - Takata, Masaki

AU - Yamauchi, Miho

PY - 2014/2/5

Y1 - 2014/2/5

N2 - We demonstrate a metal-organic framework (MOF) design for the inclusion of hydroxide ions. Salt inclusion method was applied to an alkaline-stable ZIF-8 (ZIF = zeolitic imidazolate framework) to introduce alkylammonium hydroxides as ionic carriers. We found that tetrabutylammonium salts are immobilized inside the pores by a hydrophobic interaction between the alkyl groups of the salt and the framework, which significantly increases the hydrophilicity of ZIF-8. Furthermore, ZIF-8 including the salt exhibited a capacity for OH- ion exchange, implying that freely exchangeable OH- ions are present in the MOF. ZIF-8 containing OH- ions showed an ionic conductivity of 2.3 × 10-8 S cm-1 at 25 C, which is 4 orders of magnitude higher than that of the blank ZIF-8. This is the first example of an MOF-based hydroxide ion conductor.

AB - We demonstrate a metal-organic framework (MOF) design for the inclusion of hydroxide ions. Salt inclusion method was applied to an alkaline-stable ZIF-8 (ZIF = zeolitic imidazolate framework) to introduce alkylammonium hydroxides as ionic carriers. We found that tetrabutylammonium salts are immobilized inside the pores by a hydrophobic interaction between the alkyl groups of the salt and the framework, which significantly increases the hydrophilicity of ZIF-8. Furthermore, ZIF-8 including the salt exhibited a capacity for OH- ion exchange, implying that freely exchangeable OH- ions are present in the MOF. ZIF-8 containing OH- ions showed an ionic conductivity of 2.3 × 10-8 S cm-1 at 25 C, which is 4 orders of magnitude higher than that of the blank ZIF-8. This is the first example of an MOF-based hydroxide ion conductor.

UR - http://www.scopus.com/inward/record.url?scp=84893750990&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84893750990&partnerID=8YFLogxK

U2 - 10.1021/ja410368j

DO - 10.1021/ja410368j

M3 - Article

AN - SCOPUS:84893750990

SN - 0002-7863

VL - 136

SP - 1702

EP - 1705

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 5

ER -

Design and synthesis of hydroxide ion-conductive metal-organic frameworks based on salt inclusion

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this