Synthesis and Structures of Coordination Polymers Based on a Bridging Ligand With the Thienothiophene Backbone

Ultrasonic controllable synthesis of sulfur-functionalized metal–organic frameworks (S-MOFs) and their application in piezo-photocatalytic rapid reduction of hexavalent chromium (Cr)

“…The broad peak near 1250 cm-1 indicates the characteristic of the thiophene ring [38] , [39] . In the three synthesized Bi-TDC samples, the C = O bonds shift to lower wavenumbers and split into two peaks compared to the ligand [39] , [40] , [41] ( Fig. 2 (b)).…”

“…Therefore, it can be inferred that the synthesized Bi-TDC materials have a non-centrosymmetric structure [15] , [19] , [44] , which endows them with piezoelectric properties [15] , [33] . The two peaks near 1500 cm −1 are the vs and vas modes of vibration of –COO - [37] , [41] , [45] , which also shift to lower wavenumbers compared to the –COOH vibration of the ligand [41] , [45] . This is because the carboxylate group –COOH coordinates with the metal Bi, which affects its vibration intensity and frequency [45] , [46] .…”

“…The formation of the three morphologies was due to the different coordination modes that dominated the forms, and the three different coordination modes also constituted three different asymmetric forms, which gave Bi-TDC piezoelectric properties [15] , [42] , [43] , [44] . The introduction of S element into the framework made Bi-TDC photosensitive, which resulted in different degrees of improvement in photo-piezoelectric synergistic catalysis [41] , [49] , [50] . EDS Mapping ( Fig.…”

Two-Dimensional and Three-Dimensional Coordination Polymers Based on Ln(III) and 2,5-Diiodoterephthalates: Structures and Luminescent Behavior

“…For the preparation of 1-5, we used the solvothermal approach, which is widely applied in MOF chemistry [31][32][33][34][35][36]. The crystals of 1 and 2 were isolated from the same sample; as follows from the PXRD data (see Supporting Information), it contains 1, 2 and some other unidentified phase.…”