Related Experiment Video
Updated: Feb 17, 2026
06:41
Assessment of Social Interaction Behaviors
Published on: February 25, 2011
95.4K
Structural Properties of Coniferyl Alcohol-Based Low Transition Temperature Mixtures.
Kosuke Ikeda1, Takumi Karasawa2, Takeki Miyazawa3
1Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.
ACS Omega
|February 16, 2026
Summary
Researchers explored lignin-derived monomers to create low transition temperature mixtures (LTTMs). These novel LTTMs exhibit unique structural organization and temperature-dependent molecular mobility, paving the way for new material applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Polymer Science
Background:
- Low transition temperature mixtures (LTTMs) are tunable materials with applications in various fields.
- Lignin, a complex biopolymer, offers a sustainable source of aromatic monomers.
- Exploring novel LTTM compositions is crucial for advancing materials science.
Purpose of the Study:
- To investigate the structural organization of LTTMs utilizing coniferyl alcohol, a lignin-derived monomer.
- To characterize the thermal properties and molecular dynamics of these novel LTTMs.
- To establish the role of hydrogen bonding in the structural stability of coniferyl alcohol-based LTTMs.
Main Methods:
- Preparation of LTTMs with varying molar ratios of coniferyl alcohol to choline chloride.
- Differential Scanning Calorimetry (DSC) to determine glass transition temperatures (Tg) and melting points (Tm).
- Time-domain Nuclear Magnetic Resonance (TD-NMR) spectroscopy to analyze molecular mobility.
- Fourier-Transform Infrared (FTIR) spectroscopy and proton Nuclear Magnetic Resonance (1H NMR) to probe hydrogen bonding interactions.
Main Results:
- LTTMs formed with coniferyl alcohol and choline chloride exhibited low glass transition temperatures (-24.6 to -16.8 °C) and no observable melting points.
- TD-NMR revealed heterogeneity in the LTTMs, with distinct regions of molecular mobility between 20 and 90 °C.
- FTIR and 1H NMR confirmed strong hydrogen bonding, primarily involving the coniferyl alcohol's γ-OH group, stabilizing the less mobile regions.
Conclusions:
- Coniferyl alcohol serves as a viable lignin-derived component for creating functional LTTMs.
- The LTTMs demonstrate temperature-dependent structural reorganization driven by the disruption of hydrogen bonds.
- These findings highlight the potential of bio-based monomers in designing advanced LTTMs with tunable properties.
More Related Videos
Related Concept Videos
02:56Intermolecular Forces and Physical Properties
28.2K
28.2K
02:32Physical Properties of Alcohols and Phenols
16.8K
Alcohols are organic compounds in which a hydroxy group is attached to a saturated carbon. Phenols are a class of alcohols containing a hydroxy group attached to an aromatic ring. The physical properties of the alcohols and phenols are influenced by hydrogen bonding due to the oxygen–hydrogen dipole in the hydroxy functional group and dispersion forces between alkyl or aryl regions of alcohol and phenol molecules.
Alcohols possess a higher boiling point than aliphatic hydrocarbons of similar...
Alcohols possess a higher boiling point than aliphatic hydrocarbons of similar...
16.8K
02:17Physical Properties of Ethers
8.5K
Overview
An ether molecule has a net dipole moment due to the polarity of C–O bonds. Subsequently, boiling points of ethers are lower than those of alcohols of comparable molecular weight and slightly higher than those of hydrocarbons of comparable molecular weight (Table 1).
Ethers can act as hydrogen bond acceptors, making them more water-soluble than hydrocarbons, but since ethers cannot act as hydrogen bond donors, they are much less soluble in water than alcohols. Ethers are considered...
An ether molecule has a net dipole moment due to the polarity of C–O bonds. Subsequently, boiling points of ethers are lower than those of alcohols of comparable molecular weight and slightly higher than those of hydrocarbons of comparable molecular weight (Table 1).
Ethers can act as hydrogen bond acceptors, making them more water-soluble than hydrocarbons, but since ethers cannot act as hydrogen bond donors, they are much less soluble in water than alcohols. Ethers are considered...
8.5K
02:34Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
52.1K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
52.1K
03:12Freezing Point Depression and Boiling Point Elevation
41.3K
Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
41.3K
01:31Physical Properties of Carboxylic Acids
6.4K
Carboxylic acids with lower molecular weight exhibit a sharp and unpleasant odor. They also have higher boiling and melting points than analogous compounds, such as aldehydes, ketones, and alcohols.
6.4K