Transition metal-directed assembly of diverse coordination polymers based on multifunctional ligand 2,4-dichloro-5-sulfamoylbenzoic acid

Luminescent Coordination Polymers for Highly Sensitive Detection of Nitrobenzene

“…The excitation and emission spectra of 1 – 3 are shown in Figure b,c. H 3 sba exhibits a weak emission peak at 455 nm and an intense emission peak at 545 nm . The free bpp ligand shows emission at 446 nm. , Upon excitation at 314, 312, and 310 nm, compounds 1 – 3 display luminescence emissions centered at 412, 420, and 407 nm, respectively, which are attributed to intraligand charge transfer of H 3 sba. , All of the emissions of 1 – 3 are significantly blue-shifted relative to that of free H 3 sba, which may be assigned to the coordination of metal ions to ligands. , …”

“…26 H 3 sba exhibits strong absorption in the range of 275− 310 nm with two peaks at 280 and 290 nm, which may be ascribed to an n−π* or π−π* transition. 18,19 Compounds 1−3 display a similar strong absorption in the range of 275−310 nm, which may originate from the intraligand charge-transfer transition, whereas the lower energy band from 360 to 800 nm for 1 and 2 can be considered as metal-to-ligand chargetransfer transition. 27,28 Solid-state emission spectra of 1−3 were measured at room temperature to study their potential as luminescent materials.…”

“…H 3 sba exhibits a weak emission peak at 455 nm and an intense emission peak at 545 nm. 18 The free bpp ligand shows emission at 446 nm. 29,30 Upon excitation at 314, 312, and 310 nm, compounds 1−3 display luminescence emissions centered at 412, 420, and 407 nm, respectively, which are attributed to intraligand charge transfer of H 3 sba.…”

“…It is known that introduction of rich electron–donor ligands could efficiently construct luminescent CPs. In our previous works, we have demonstrated that electron–donor 2,4-dichloro-5-sulfamoylbenzoic acid (H 3 sba) and its analogue (4-chloro-5-sulphamoylbenzoic acid) could induce the synthesis of luminescent CPs, which exhibit good and tunable luminescent properties. , In addition, H 3 sba possesses multicoordinating groups (one carboxylate and one sulphonylamino groups, two Cl atoms), which could generate different coordination modes and satisfy the construction of diverse structures. Here, H 3 sba is chosen as ligand and three new luminescent CPs [Ag 2 (bpp)­(Hsba)]·H 2 O ( 1 ), [Cd­(bpp)­(Hsba)·H 2 O] ( 2 ), and [Pb­(bpp) 3 ­(H 2 sba) 2 ] ( 3 ) are synthesized.…”

“…In our previous works, we have demonstrated that electron−donor 2,4dichloro-5-sulfamoylbenzoic acid (H 3 sba) and its analogue (4-chloro-5-sulphamoylbenzoic acid) could induce the synthesis of luminescent CPs, which exhibit good and tunable luminescent properties. 18,19 In addition, H 3 (3) are synthesized. We demonstrate here that the three title compounds can be used as excellent sensors for detection of NB with high selectivity, sensitivity, stability, and recyclability.…”