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Usage

General Description

2,5-diethoxy-1,4-benzenedicarboxylic acid, also known as Diethyl terephthalate (DET), is an organic compound derived from terephthalic acid. It is commonly used as a plasticizer in the production of PVC and other polymers. DET is also used in the synthesis of pharmaceuticals, such as diethyl terephthalate, and insect repellents. It is a colorless, odorless solid that is soluble in organic solvents. Due to its low toxicity and versatile applications, 2,5-diethoxy-1,4-benzenedicarboxylic acid is a valuable chemical in various industries.

Upstream product

• 74-96-4 ethyl bromide 
• 5870-37-1 2,5-Dihydroxybenzol-1,4-dicarbonsaeure-dimethylester 
• 5870-38-2 diethyl 2,5-(dihydroxy)terephthalate 
• 610-92-4 2,5-dihydroxy-1,4-benzenedicarboxylic acid 
• 173267-24-8 diethyl 2,5-diethoxyterephthalate 
• 101448-37-7 1,4-diethoxy-2,5-bis(ethoxymethyl)benzene 

Relevant academic research and scientific papers

Fine-tuning the pore structure of metal-organic frameworks by linker substitution for enhanced hydrogen storage and gas separation

The modification of metal-organic frameworks (MOFs) by functionalizing ligands has been investigated for improved properties. In this study, by introducing substituents to the backbone of organic linkers, isostructural dihydroxy-/dialkoxy-functionalized Zr-MOFs were delicately constructed and sophisticatedly characterized for crystallinity, morphology, porosity and structural defects. Pure-component CO2, CH4, N2, and H2adsorption isotherms on the microporous synthesized materials were investigated under the pressure up to 10 MPa at 303 K. By the ideal adsorbed solution theory (IAST) model, enhanced adsorption selectivity towards CO2/N2, CO2/CH4, CH4/N2and CO2/H2binary mixtures was observed compared to the parent material, and dihydroxy functionalization endows the material with high selectivity towards CO2/H2. Moreover, the diethoxy-functionalized material with narrow cavities exhibits improved high pressure H2adsorption due to structural defects and strong overlapping potentials.

A Modulated Hydrothermal (MHT) Approach for the Facile Synthesis of UiO-66-Type MOFs

Developing a general and economically viable approach for the large-scale synthesis of water-stable metal-organic frameworks (MOFs) with repeatable quality remains the key step for their massive production and commercialization. We herein report a green (

Increasing Alkyl Chain Length in a Series of Layered Metal-Organic Frameworks Aids Ultrasonic Exfoliation to Form Nanosheets

Metal-organic framework nanosheets (MONs) are attracting increasing attention as a diverse class of two-dimensional materials derived from metal-organic frameworks (MOFs). The principles behind the design of layered MOFs that can readily be exfoliated to form nanosheets, however, remain poorly understood. Here we systematically investigate an isoreticular series of layered MOFs functionalized with alkoxy substituents in order to understand the effect of substituent alkyl chain length on the structure and properties of the resulting nanosheets. A series of 2,5-alkoxybenzene-1,4-dicarboxylate ligands (O2CC6H2(OR)2CO2, R = methyl-pentyl, 1-5, respectively) was used to synthesize copper paddle-wheel MOFs. Rietveld and Pawley fitting of powder diffraction patterns for compounds Cu(3-5)(DMF) showed they adopt an isoreticular series with two-dimensional connectivity in which the interlayer distance increases from 8.68 ? (R = propyl) to 10.03 ? (R = pentyl). Adsorption of CO2 by the MOFs was found to increase from 27.2 to 40.2 cm3 g-1 with increasing chain length, which we attribute to the increasing accessible volume associated with increasing unit-cell volume. Ultrasound was used to exfoliate the layered MOFs to form MONs, with shorter alkyl chains resulting in higher concentrations of exfoliated material in suspension. The average height of MONs was investigated by AFM and found to decrease from 35 ± 26 to 20 ± 12 nm with increasing chain length, with the thinnest MONs observed being only 5 nm, corresponding to five framework layers. These results indicate that careful choice of ligand functionalities can be used to tune nanosheet structure and properties, enabling optimization for a variety of applications.

Novel dirhodium coordination polymers: The impact of side chains on cyclopropanation

Seven novel dirhodium coordination polymers (Rh2-Ln) (n = 1-7) are prepared by employing bitopic ligands to connect dirhodium nodes. The formation of the framework is confirmed by attenuated total reflectance Fourier transform infrared (ATR-FTIR) and 1H → 13C cross polarization magic angle spinning nuclear magnetic resonance (CP MAS NMR) spectroscopy. Defect sites resulting from incomplete ligand substitution are revealed by 19F MAS NMR. The random stacking behavior of the frameworks in the obtained solid is analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Rh2/O interaction in neighboring layers is investigated by diffuse reflectance ultra-violet visible light (DR-UV-vis) spectroscopy and X-ray photoelectron spectroscopy (XPS). This interaction is relevant to understand the catalytic behavior of various Rh2-Ln catalysts in the cyclopropanation of styrene with ethyl diazoacetate (EDA). In this context, the structure-reactivity relationship is discussed by taking into consideration both interlayer Rh2/O interactions and steric effects of side chains.

Zinc-1,4-benzenedicarboxylate-bipyridine frameworks - Linker functionalization impacts network topology during solvothermal synthesis

Substitution of 1,4-benzenedicarboxylate (bdc) with additional alkoxy chains is the key to construct a family of metal-organic frameworks (MOFs) of the type [Zn2(fu-bdc)2(bipy)]n (fu-bdc = functionalized bdc; bipy = 4,4′-bipyridine) exhibiting a honeycomb-like topology instead of the default pillared square-grid topology. Both the substitution pattern of the phenyl ring of the fu-bdc linker and the chain length of the alkoxy substituents have a major impact on the structure of the derived frameworks. Substitution at positions 2 and 3 leads to the trivial pillared square-grid framework, and substitution at positions 2 and 5 or 2 and 6 yields MOFs with the honeycomb-like topology. Also, simple methoxy substituents lead to the construction of a pillared square-grid topology, whereas longer substituents like ethoxy, n-propoxy, and n-butoxy generate honeycomb-like framework structures. These honeycomb MOFs feature one-dimensional channels, which are tuneable in diameter and functionality by the choice of substituent attached to the bdc-type linker. Pure component sorption isotherms indicate that the honeycomb-like frameworks selectively adsorb CO2 over N 2 and CH4. The Royal Society of Chemistry 2011.

Little change but great effect: Varying supra-molecular interactions in 2,5-dimethoxyterephthalic acid and 2,5-diethoxyterephthalic acid

The title terephthalic acid derivatives, namely 2,5-dimethoxyterephthalic acid, C10H10O6, (I), and 2,5- diethoxyterephthalic acid, C12H14O6, (II), exhibit nearly planar molecular structures, with maximum deviations from the leastsquares planes calculated for all non-H atoms of 0.0418 (6) and 0.0902 (10) A for (I) and (II), respectively. The molecules of both title compounds contain an inversion centre and thus the asymmetric unit of both crystal structures consists of only half a molecule. It is a remarkable fact that a comparatively small change in the substitution of the terephthalic acid [dimethoxy in (I) versus diethoxy in (II)] causes major differences in the dominating supramolecular interactions. While in (II) the packing structure is stabilized by typical intermolecular hydrogenbonded carboxylic acid dimer interactions, the carboxyl group in (I) forms an unusual intramolecular hydrogen bond with the O atom of the neighbouring methoxy group.