Synthesis and characterization of two 3-D polymeric lanthanide complexes constructed from 1,2,4,5-benzenetetracarboxylic acid

A 3-D lanthanide coordination polymer constructed from biphenyl-2,2′,6,6′-tetracarboxylic acid: synthesis of a trinodal (3,4,5)-connected topology and luminescence

“…Lanthanide ions have been employed in preparation of coordination polymers with interesting networks and properties because of higher coordination numbers and inherent flexibility [17,[22][23][24][25][26][27][28][29]. Lanthanide-based coordination polymers can possess interesting luminescent properties, which may offer applications in chemical sensing, medical imaging, radiation detection, biological, and electro-optical devices [30][31][32][33][34][35][36][37][38][39].…”

Gözenekli malzemelerde Pr(III) iyonlarının anten etkisi ile duyarlılaştırılması

“…The absence of the band at about 1700 cm -1 [ν(C=O)] which exist in the H 4 btec ligand for complex 1 is originated from deprotonation of the ligand in the complex[15]. The absorption bands due to the asymmetric [ν asym (COO)] and symmetric [ν sym (COO)] vibration of carboxylate were observed between 1594 and 1326 cm -1 for complex 1[16].…”

Three unprecedented high-connected 3D lanthanide–organic frameworks based on benzene-1,2,4,5-tetracarboxylic acid

“…Benzene-1,2,4,5-tetracarboxylic acid (H 4 bta) has high symmetry and eminent π-conjugate system which contribute to the generation of regular structures, and its four carboxylic groups may chelate metal ions by various coordination modes [10][11][12][13] to form fascinating multidimensional compounds . Additionally, H 4 bta has been proven to be a good ligand in the construction of MOFs, and a few 3D MOFs involving highconnected frameworks based on H 4 bta have been obtained by other groups [14][15][16][17][18][19][20]. For example, Cui and co-workers prepared three high-connected MOFs, {[Cd 3 (bta)(btx) 0.5 (μ 3 -OH)(H 2 O)] · H 2 O} n , [Cu 2 (bta)(btx) 1.5 ] n and {[Co 5 (bta) 2 (btx)(μ 3 -OH) 2 (H 2 O) 2 ] · 2H 2 O} n , with H 4 bta and 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene (btx) as mixed ligands [15,16].…”

“…For example, Cui and co-workers prepared three high-connected MOFs, {[Cd 3 (bta)(btx) 0.5 (μ 3 -OH)(H 2 O)] · H 2 O} n , [Cu 2 (bta)(btx) 1.5 ] n and {[Co 5 (bta) 2 (btx)(μ 3 -OH) 2 (H 2 O) 2 ] · 2H 2 O} n , with H 4 bta and 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene (btx) as mixed ligands [15,16]. Lanthanide-organic frameworks based on H 4 bta exhibit fascinating topological structures and catch much more attentions [17][18][19][20]. Ln-MOFs based on H 4 bta reported by predecessors could be mainly classified into four types as follows: (i) Ln-bta [12,[17][18][19][21][22][23][24][25][26][27], (ii) Ln-bta-POM (POM = Polyoxometallates) [28], (iii) Ln-bta-M (M = Na, K, Cu, Nb, U) [13,[29][30][31][32], (iv) Ln-bta-L (L = oxalic acid, glutaric acid, 4,4′-bipyridine, etc.)…”

“…Ln-MOFs based on H 4 bta reported by predecessors could be mainly classified into four types as follows: (i) Ln-bta [12,[17][18][19][21][22][23][24][25][26][27], (ii) Ln-bta-POM (POM = Polyoxometallates) [28], (iii) Ln-bta-M (M = Na, K, Cu, Nb, U) [13,[29][30][31][32], (iv) Ln-bta-L (L = oxalic acid, glutaric acid, 4,4′-bipyridine, etc.) [20,[33][34][35]. In view of the foregoing, we have utilized H 4 bta to generate three high-connected Ln-bta frameworks reported here, {[Ln 2 (bta) 1.5 (H 2 O) 4 ] · 3H 2 O} n (Ln = La(1) and Ce(2)) and [Pr(bta) 0.5 (H 2 bta) 0.5 (H 2 O)] n (3).…”