AI Article Synopsis

  • Ionic liquids (ILs) are valuable for research due to their unique properties as solvents and electrolytes, but understanding their transport properties is crucial for practical applications.
  • This study synthesizes novel protic and aprotic ILs based on the tetramethylguanidinium (TMG) cation, measuring their thermal transitions, densities, and transport characteristics using various techniques.
  • The research highlights the relationship between ion movement and transport properties, noting that protic TMG ILs exhibit lower ionicity with certain acid-base combinations, which might be due to stronger hydrogen bonding or reduced anti-correlations between ions.

Article Abstract

Ionic liquids (ILs) are a promising class of solvents, functional fluids and electrolytes that are of high interest for both basic as well as applied research. For further fundamental understanding of ILs and a successful implementation in technical processes, a deeper insight into transport properties and their interrelations is of particular importance. In this contribution we synthesised a series of mostly novel protic and aprotic ILs based on the tetramethylguanidinium (TMG) cation that is a derivative of the superbase guanidine. Different substitution patterns and anions from acids with broadly varied p values were investigated. We measured general properties, such as thermal transitions and densities of these ILs, as well as their transport quantities by means of rheology, impedance spectroscopy and NMR diffusometry. Different models for the correlation of the transport properties, namely the Nernst-Einstein, Walden and Stokes-Einstein-Sutherland relations were applied. The deviation from ideal behaviour of fully dissociated electrolytes, often termed as ionicity, was quantified by the reciprocal Haven ratio, fractional Walden rule and ionicity obtained from the Walden plot. Velocity cross-correlation coefficients were calculated to gain further insight into the correlation between ion movements. Both protic and aprotic TMG ILs show transport properties comparable to other ILs with similar molecular weight and high ionicity values especially in contrast to other protic ILs. Lowest ionicity values were found for the protic ILs with smallest Δp values between constituting acid and base. This can either be explained by stronger hydrogen bonding between cation and anion or lower anti-correlations between the oppositely charged ions. These results aim to provide insight into the properties of this interesting cations class and a deeper understanding of the transport properties of ILs and their interrelations in general.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9091945PMC
http://dx.doi.org/10.1039/c8ra07412gDOI Listing

Publication Analysis

Top Keywords

transport properties
20
protic aprotic
12
ils
9
ionic liquids
8
ionicity values
8
protic ils
8
transport
6
properties
6
protic
5
properties protic
4

Similar Publications

The functions of graphene have garnered significant attention in recent research. A profound understanding of the principles of temperature-dependent electromagnetic responses is crucial for guiding the design of advanced functional materials and devices. From this perspective, the thermally tailored mechanisms of polarization genes and conduction genes are emphasized.

View Article and Find Full Text PDF

Giant anisotropic piezoresponse of layered ZrSe.

Nanoscale Horiz

December 2024

2D Foundry Research Group, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), 28049 Madrid, Spain.

We investigated the effect of uniaxial strain on the electrical properties of few-layer ZrSe devices under compressive and tensile strains applied up to ±0.62% along different crystal directions. We observed that the piezoresponse, the change in resistance upon application of strain, of ZrSe strongly depends on both the direction in which electrical transport occurs and the direction in which uniaxial strain is applied.

View Article and Find Full Text PDF

Zn-based biodegradable metals (BMs) are regarded as revolutionary biomaterials for bone implants. However, their clinical application is limited by insufficient mechanical properties, delayed degradation, and overdose-induced Zn toxicity. Herein, innovative multi-material additive manufacturing (MMAM) is deployed to construct a Zn/titanium (Ti) hetero-structured composite.

View Article and Find Full Text PDF

Dataset of some added-lignin thermoformed pulps.

Data Brief

December 2024

RISE PFI AS, Høgskoleringen 6B, 7491 Trondheim, Norway.

This data article summarizes the material properties of some added-lignin thermoformed pulps (ALTPs). This type of molded pulp is particularly suited for replacing plastics in environments, where moisture is encountered, as the lignin reduces the transport and adsorption of water. The dataset was measured on wet formed substrates with either softwood chemi-thermomechanical pulp (CTMP) or northern bleached softwood Kraft pulp (NBSK).

View Article and Find Full Text PDF

MCFD2 and ERGIC-53 form a cargo receptor complex that plays a crucial role in transporting specific glycoproteins, including blood coagulation factor VIII, from the endoplasmic reticulum to the Golgi apparatus. We have demonstrated that MCFD2 recognizes a 10-amino-acid sequence in factor VIII, thereby facilitating its efficient transport. Moreover, the secretion of biopharmaceutical recombinant glycoproteins, such as erythropoietin, can be enhanced by tagging them with this sequence, which we have termed the "passport sequence" (PS).

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: