Molecular Architecture Effects on Bulk Nanostructure in Bis(Orthoborate) Ionic Liquids

Author:

Hammond Oliver S.12,Bousrez Guillaume12,Mehler Filip3,Li Sichao3,Shimpi Manishkumar R.14,Doutch James5,Cavalcanti Leide5,Glavatskih Sergei678,Antzutkin Oleg N.4,Rutland Mark W.37910,Mudring Anja‐Verena12ORCID

Affiliation:

1. Department of Materials and Environmental Chemistry Stockholm University Stockholm SE‐114 18 Sweden

2. Department of Biological and Chemical Engineering and iNANO Aarhus University Aarhus C 8000 Denmark

3. Division of Surface and Corrosion Science School of Engineering Sciences in Chemistry, Biotechnology and Health KTH Royal Institute of Technology Stockholm SE-100 40 Sweden

4. Chemistry of Interfaces Luleå University of Technology Luleå SE‐971 87 Sweden

5. ISIS Neutron & Muon Source, Science and Technology Facilities Council Rutherford Appleton Laboratory Harwell‐Oxford OX11 0QX UK

6. Department of Engineering Design KTH Royal Institute of Technology Stockholm SE‐10044 Sweden

7. School of Chemistry University of New South Wales Sydney 2052 Australia

8. Department of Electromechanical, Systems and Metal Engineering Ghent University Ghent B‐9052 Belgium

9. Bioeconomy and Health Department Materials and Surface Design RISE Research Institutes of Sweden Stockholm SE-114 86 Sweden

10. Laboratoire de Tribologie et Dynamique des Systèmes École Centrale de Lyon Lyon 69130 France

Abstract

AbstractA series of 19 ionic liquids (ILs) based on phosphonium and imidazolium cations of varying alkyl‐chain lengths with the orthoborate anions bis(oxalato)borate [BOB], bis(mandelato)borate, [BMB] and bis(salicylato)borate, [BScB], are synthesized and studied using small‐angle neutron scattering (SANS). All measured systems display nanostructuring, with 1‐methyl‐3‐n‐alkyl imidazolium‐orthoborates forming clearly bicontinuous L3 spongelike phases when the alkyl chains are longer than C6 (hexyl). L3 phases are fitted using the Teubner and Strey model, and diffusely‐nanostructured systems are primarily fitted using the Ornstein‐Zernicke correlation length model. Strongly‐nanostructured systems have a strong dependence on the cation, with molecular architecture variation explored to determine the driving forces for self‐assembly. The ability to form well‐defined complex phases is effectively extinguished in several ways: methylation of the most acidic imidazolium ring proton, replacing the imidazolium 3‐methyl group with a longer hydrocarbon chain, substitution of [BOB] by [BMB], or exchanging the imidazolium for phosphonium systems, irrespective of phosphonium architecture. The results suggest there is only a small window of opportunity, in terms of molecular amphiphilicity and cation:anion volume matching, for the formation of stable extensive bicontinuous domains in pure bulk orthoborate‐based ILs. Particularly important for self‐assembly processes appear to be the ability to form H‐bonding networks, which offer additional versatility in imidazolium systems.

Funder

Knut och Alice Wallenbergs Stiftelse

Vetenskapsrådet

Royal Swedish Academy of Sciences

Villum Fonden

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3