The tunable luminescent property and wide band gap in three 1D hybrid templated borates containing different metallic ions and oxoboron clusters

Recent Advances in Crystalline Oxidopolyborate Complexes of d-Block or p-Block Metals: Structural Aspects, Syntheses, and Physical Properties

“…nH2O (2) (1,3-diaminopropane) [9], [Cd(tren){B8O11(OH)4}]n (3) (tren) = tris(2-aminoethyl)amine) [10], [Cd(pn){B6O7(OH)6}]n . nH2O (4) (pn = 1,2-diaminopropane) [11], [{Cd3(H2O)4(NO3)2}{B6O9(OH)2}2]n (5) [12] and four related compounds, exemplified by [pyH]2[Cd(py)2{B14O20(OH)6}](6) (py = pyridine) [13].The FBB's in these compounds are mostly complex with the pentaborate(2-) unit in 1 is based on a FBB of 4(4-1) with a pendant -B(OH)2 unit (FBB = 1) replacing a terminal H atom on a T unit of the larger FBB and can be designated a compounded descriptor 5: Compound 1 is a hybrid inorganic-organic 3-D coordination polymer [8]. The 22electron Cd (II) center adopts a distorted six-coordinate octahedral complex with two trans N-donor from two different 1,4-dab ligands (forming a 1-D chain) and four O-donor atoms from two oxidoborate network ligands (Figure 1a).…”

“…Compound 4 is an octahedral 22-electron Cd (II) complex with a cis-pn ligand and four O-donors from two hexaborate(2-) ligands, forming a 1-D coordination polymer chain [11]. One of the hexaborate ligands is coordinated fac to the Cd (II) center via the three OH groups bound to tetrahedral boron atoms and the final coordination bond is formed from a trigonal boron OH group from another hexaborate(2-) unit (Figure 1c).…”

“…One of the hexaborate ligands is coordinated fac to the Cd (II) center via the three OH groups bound to tetrahedral boron atoms and the final coordination bond is formed from a trigonal boron OH group from another hexaborate(2-) unit (Figure 1c). The structure of this complex is described as [11] but is better formulated as [Cd(pn){B 6 O 7 (OH) 6 }] n •nH 2 O (4). The hexaborate(2-) units in 4 not only bridge two Cd (II) centers but are also further linked together to form an extended network which is interconnected via a strong H-bonding.…”

“…The central 22-electron Cd (II) center of the centrosymmetric {Cd 3 (H 2 O) 4 (NO 3 ) 2 } 4+ sub-unit (marked Cd* in Figure 2a) has two trans NO 3 − ligands and all three Cd (II) centers are octahedral with remaining sites occupied by terminal or bridging H 2 O ligands or oxidoborate O-donor centers. Compound 4 is an octahedral 22-electron Cd (II) complex with a cis-pn ligand and four O-donors from two hexaborate(2-) ligands, forming a 1-D coordination polymer chain [11]. One of the hexaborate ligands is coordinated fac to the Cd (II) center via the three OH groups bound to tetrahedral boron atoms and the final coordination bond is formed from a trigonal boron OH group from another hexaborate(2-) unit (Figure 1c).…”

“…The structure of this complex is described as [Cd(1,2-dap)][B6O11(OH)2] . H2O in [11] but is better formulated as [Cd(pn){B6O7(OH)6}]n . nH2O (4).…”