148-04-9

Usage

InChI:InChI=1/C10H6O8.4Na/c11-7(12)3-1-4(8(13)14)6(10(17)18)2-5(3)9(15)16;;;;/h1-2H,(H,11,12)(H,13,14)(H,15,16)(H,17,18);;;;/q;4*+1/p-4

Upstream product

• 89-32-7 Pyromellitic dianhydride 

Downstream Products

• 1644640-81-2 2-(2-pyridylamino)pyridinium trihydrogen pyromellitate 
• 1147100-49-9 cyclohexane-1r,2t,4t,5c-tetracarboxylic acid 

Relevant academic research and scientific papers

Exploration of a calcium-organic framework as an anode material for sodium-ion batteries

In this communication, we designed and synthesized a novel calcium-organic framework and presented it as an anode material for sodium-ion batteries. The results show that it delivers a reversible capacity of higher than 140 mA h g-1 even after 300 cycles. The remarkable performance is attributed to the high structural stability and extremely low solubility of the calcium-organic framework in electrolytes.

Colorless polyimides derived from 1S,2S,4R,5R-cyclohexanetetracarboxylic dianhydride, self-orientation behavior during solution casting, and their optoelectronic applications

A novel cycloaliphatic monomer for polyimides (PI), 1S,2S,4R,5R- cyclohexanetetracarboxylic dianhydride (H′-PMDA) is proposed in this work. H′-PMDA shows high polymerizability with various diamines in contrast to its isomer, i.e., conventional hydrogenated pyromellitic dianhydride (H-PMDA) and leads to highly flexible and colorless PI films with very high T g's. In particular, the combinations with rigid structures of diamines give rise to PIs with significantly decreased coefficients of thermal expansion (CTE) owing to high extents of in-plane chain orientation induced by thermal imidization, whereas the H-PMDA-based counterparts do not. The decreased CTE reflects structural rigidity/linearity of the H′-PMDA-based diimide units as supported by liquid crystallinity observed in the corresponding model compound. Solution casting of a chemically imidized PI derived from H′-PMDA and 2,2′-bis(trifluoromethyl)benzidine (TFMB) results in a lower CTE than that of the thermally imidized counterpart, suggesting the presence of a self-orientation phenomenon during solvent evaporation. The mechanism is proposed in this work. H′-PMDA/TFMB and its copolymer systems can be useful as plastic substrates in image display devices and/or novel coating-type optical compensation films.