Syntheses, characterization and luminescent properties of two lead(II) fumarate metal-organic frameworks

Synthesis, crystal structure and characterization of lead(II) coordination polymers with tetrafluorosuccinate/hexafluoroglutarate

“…When the somewhat longer PbÁ Á ÁO distances are considered, the Pb 2+ ion is also bonded by other oxygen atom of HFSA anion with Pb1-O2 bond distance of 2.880 Å. The Pb-O distances are similar to those observed in other lead(II) carboxylate complexes [31][32][33][34]. If the weak PbÁ Á ÁO interactions are taken into account, TFSA ligand adopts chelating-bridging tridentate coordination mode in the 2-D sheet (Fig.…”

“…3), which are red-shifted compared to that of free phen. The luminescence of 1 and 2 can be assigned to the ligand-to-metal chargetransfer (LMCT) [28,40,41]. It is well established that ligand play an important role in luminescent properties of the complexes [35][36][37][38][39].…”

“…Among p-block metal ions, lead(II), as a heavy p-block metal ion, possesses biological activities, large ion radius, and flexible coordination environment, so, the coordination chemistry of lead(II) was discussed [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. For this reason, the lead(II) complexes with carboxylates have recently been investigated [22][23][24][25][26][27][28][29][30][31][32][33][34]. Tetrafluorosuccinic acid (H 2 TFSA) and hexafluoroglutaric acid (H 2 HFGA) are flexible and fully fluorinated ligands which are good for the construction of metal coordination polymers with fascinating structures and characteristic properties.…”

Synthesis and crystal structure of a novel lead coordination polymer, [[Pb3(C8H3O7S)2(C3H7NO)2.5(H2O)]·1.5H2O]n, C47H57N5O38Pb6S4

“…Also lead(II) has alarge radius, flexible coordination environment and various stereochemical activities, and provides unique opportunities for formation of unusual network topologies with interesting properties. Lead(II) contains the 6s 2 lone-pair, and the absence of crystal field stabilization energy, whichcan causedistortion in coordination sphere [4][5][6][7][8][9],allows for variable coordination numbers. Anumber of polymeric Pb(II) compounds have been structurally characterized, and frequently discussedc onsidering thes tereo-chemical activity of valence shell electron lone pairs [10][11][12][13][14][15][16].…”

Hydrothermal synthesis and characterization of a 3D luminescent lead(II) framework containing 3D Pb–X–Pb linkage (X=O and Cl) tuned by cis- and trans-ligand conformations

“…When trans-butenedioic acid (L 2 ) is used to replace cis-butenedioic acid under the same hydrothermal synthetic conditions, a recently reported compound {[Pb 2 (L 2 ) 2 (H 2 O) 4 ] Á 2H 2 O} n (2) can be isolated [9]. The structure of 2 is quite different from that of 1, it contains I 1 O 2 type connectivity and no chloride atoms participate in the coordination framework.…”