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• 99-31-0 5-aminoisophthalic acid 
• 7732-18-5 water 

Relevant academic research and scientific papers

Two supramolecular isomers of dimeric cobalt(II) 5-aminoisophthalate: 2D (4,63) vs 3D Rutile nets

The hydrothermal preparation via variations of the solvent conditions of Co(NO3)2·6H2O with 5-aminoisophthalic dianion (5-NH2-bdc) exhibits two new supramolecular isomerism of [Co(C8NH5O4)(H2O)]n·2nH2O (1) and [Co(C8NH5O4)(H2O)]n (2). The reaction in EtOH/H2O resulted in a layered structure of 1 featuring an unusual zigzag water chain between adjacent sheets, and that in H2O led to an open 3D framework structure of 2. The structural data suggest that both the relative orientations in the ligand placement and the donor groups arrangement around the cobalt center are the key factor affecting the patterns of conformational supramolecular isomerism of 1 and 2. More interestingly, simplified by considering the cobalt dimer and NH2-bdc ligand represented an octahedronal node and a triangular node, respectively, structural diversity of 1 and 2 exhibits a structure evidence of 3,6-connecting building blocks with different topologies from 2D (4,63) net to 3D Rutile net. Two Complexes exhibit the excellent thermal stability with the tolerate temperature ca. 440 °C for 1 and 410 °C for 2, respectively, which attribute to the presence of abundant coordination bonds of the μ4 bridging mode dianion, and the chelate effect of carboxylate groups in the dimer SBUs.

Two cobalt(II) 5-aminoisophthalate complexes and their stable supramolecular microporous frameworks

Two stable supramolecular microporous cobalt(II) polymers, namely [Co(HAIP)2]n?3nH2O (1) and [Co(AIP)(H 2O)]n (2), AIP = 5-aminoisophthalate, were hydrothermally synthesized and characterized by single-crystal X-ray diffraction, IR spectra, thermogravimetric analyses, and variable-temperature magnetic susceptibility measurements. The two complexes are constructed from the same Co 2(CO2)2 SBU, which is extended into a 1D chain in 1 and a 2D layer in 2. As a result, 1 and 2 are 2D and 3D coordination polymers, respectively. The 3D supramolecular network of complex 1 is held up by strong hydrogen bonds formed between carboxylate groups and shows very high stability when the free H2O molecules are removed, indicating an extraordinarily stable H-bonding system. Upon water ligands being liberated, complex 2 becomes a stable microporous solid with coordination-unsaturated Co centers. The behavior of the susceptibility curve of 1 suggests the occurrence of an interesting intrachain antiferromagnetic coupling between the Co(II) ions and the presence of a significant orbital contribution, whereas the features of 2 indicate an antiferromagnetic coupling with TN = 3.5 K and a long-range antiferromagnetic order with a field-induced magnetic transition.

Hydrothermal synthesis, structures, and magnetic properties of three novel 5-aminoisophthalic acid ligand bridged transition metal cation polymers

Three novel 5-aminoisophthalic acid (AIP) bridged polymers [Co(C8NH5O4)(H2O)]n (1), [Ni(C8NH5O4) (H2O)2]n (2), and [Zn(C8NH5O4)(H2O)]n (3) were synthesized by hydrothermal reactions and characterized by IR, Raman, elemental analysis, ESR, and magnetic measurements. X-ray single-crystal analyses were carried out for [Co(C8NH5O4)(H2O)]n (1), which crystallizes in the triclinic system, space group P1, with a = 6.477(1) A, b = 7.130(1) A, c = 9.826(2)A, α = 108.9(1)°, β = 93.97(3)°, γ = 98.82(3)° and Z = 2; for [Ni(C8NH5O4) (H2O)2]n (2), in the triclinic system, space group P1, a = 6.425(1) A, b = 8.115(2) A, c = 10.146(2) A, α = 113.09(3)°, β = 99.64(3)°, γ = 98.90(3)°, and Z = 2; and for [Zn(C8NH5O4)(H2O)]n (3), in the monoclinic system, space group P2(1)/n, a = 9.044(1) A, b = 8.264(1) A, c = 11.646(1) A, β = 100.77(1)°, and Z = 4. The single X-ray diffraction studies reveal that 1 consists of an infinite honeycomb layer formed by four crystallographically independent motifs packed alternatively together; 2 consists of an infinite neutral railroad-like linear polymer, and 3 consists of infinite layers of alternating four-coordinated Zn(II) cations and AIP ligands. Finally, they are all packed into beautiful three-dimensional frameworks through complicated hydrogen bonding. Antiferromagnetic and ferromagnetic behaviors were observed for 1 and 2 from the magnetic measurements.

Porous metal-organic frameworks with 5-aminoisophthalic acid as platforms for functional applications about high photodegradation efficiency of phenol

Four novel complexes, [CoL(H2O)] (1), [ZnL(H2O)] (2), [Ni- (HL)2(H2O)2]2H2O (3), and [CdL(H2O)]H2O (4) (L = 5-aminoisophthalic acid), were successfully synthesized by the reaction of transition metal salts and 5-aminoisophthalic acid at hydrothermal conditions. The four complexes were characterized by element analysis, infrared spectra, UV-vis spectra, powder X-ray diffraction analysis, and thermogravimetric analysis. X-ray single-crystal diffraction analysis showed that the four complexes were 3D network structures and contained pores with sizes of 7.05 to 14.67 ?. In addition, we investigated the photodegradation ability of the four complexes for phenol solution under UV irradiation. The results showed that the four complexes had a different degree of degradation ability to phenol solution. At the same time, we found that the degradation process was in accordance with the pseudo-secondorder dynamics model, that is, the rate of degradation is controlled by the extra-particle process such as surface adsorption. Moreover, we further confirmed by high-performance liquid chromatography that the complexes are indeed a significant ability to degrade phenol.