Auxiliary ligand-modulated trisimidazole-based coordination polymers: syntheses, structures and photoluminescence properties

Tseng, Tien‐Wen; Luo, Tzuoo‐Tsair; Kan, Shou-Ju; Nguyen, Doan Duy-An

doi:10.1039/d1ce00068c

Cited by 7 publications

(2 citation statements)

References 154 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak positions of CUST-781 and CUST-782 are similar to their ligands, indicating that the luminescence of CUST-781 and CUST-782 originates from the energy transfer within the ligand. − Notably, CUST-781 and CUST-782 show blue shifts of 68 and 60 nm, respectively, compared to the ligand. This may be due to the coordination effect between ligands and metal ions in MOFs, , and the charge transfer from ligands to metal ions causes the emission peak to shift in the direction of short wavelengths. In addition, the π–π bond in the complex acts as an energy trap, reducing nonradiative energy loss and producing blue shift .…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Cadmium-Based Metal–Organic Frameworks for the Detection of Ion and Molecule in Aqueous Media

Zhang,

He,

Zhang

et al. 2024

Crystal Growth & Design

View full text Add to dashboard Cite

The development of materials capable of simultaneously detecting multiple analytes has been a significant challenge. This paper presents the synthesis of two novel Cd-MOFs, namely CUST-781 and CUST-782 (CUST = Changchun University of Science and Technology), using a solvothermal synthesis method. CUST-781 and CUST-782 were carefully characterized. CUST-781 and CUST-782 are both two-dimensional supramolecular structures formed through hydrogen bonding. Luminescence sensing studies demonstrate that CUST-781 can sensitively detect lower concentrations of Fe3+, 2,4,6-trinitrophenol (TNP), and the antibiotic ceftriaxone sodium. Similarly, CUST-782 shows fluorescence quenching in response to Fe3+, Cr2O7 2–, TNP, and the antibiotic tetracycline. The possible mechanisms of fluorescence quenching were investigated in detail. It can be inferred that CUST-781 and CUST-782 serve as fluorescent probes to provide a new strategy for directly detecting harmful substances in aqueous solution.

show abstract

Section: Resultsmentioning

confidence: 99%

Multifunctional Cadmium-Based Metal–Organic Frameworks for the Detection of Ion and Molecule in Aqueous Media

Zhang,

He,

Zhang

et al. 2024

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

“…The coordinated solvent molecules occupying the apical positions of the manganese polyhedra further altered the packing of these sheets and influenced the extent of antiferromagnetic interactions between the magnetic centers . Auxiliary ligands are commonly employed to impart alternate structural characteristics in CPs for target-specific applications. − They have affected crystallization pathways of CPs in various ways: (i) Neutral auxiliary ligand (e.g., 2,2′- bipy , phen ): generally blocked the coordinating site of the metal ion while ligands such as 4,4′- bipy pillared chains or sheets. ,− (ii) Ionic auxiliary ligands like lactic acid provided different coordination environments and thereby opened up new structural diversity. , An analysis of the structural landscape of the system Mn(II)-semirigid aromatic dicarboxylates with and without an auxiliary ligand revealed several interesting structural features (Table S1). Reaction of manganese(II) with an aromatic dicarboxylate in a suitable solvent is expected to precipitate a solid with the composition [Mn II R(COO) 2 ]. , However, Table S1 shows a range of compositions and structural diversities depending on the crystallization condition.…”

Section: Introductionmentioning

confidence: 99%

Crystallization and Magnetic Behavior of Manganese(II) 4,4′-Benzophenone Dicarboxylates and a Comparison of Its Structural Landscape with 2,4′-Benzophenone Dicarboxylate

Singh,

Yadav,

Balendra

et al. 2023

Crystal Growth & Design

View full text Add to dashboard Cite

Exploration of the structural landscape of the system Mn(II) salt−4,4′-benzophenone dicarboxylic acid−N-donor based auxiliary ligand−solvent using high-throughput solvothermal reaction led to the isolation of seven new coordination polymers (CPs): [Mn(phen)(H 2 O)(4,4′-bpdc) 2 ] 1, [Mn 3 (2,2′-bipy) 2 (4,4′-bpdc) 3 ]•solvent (solvent = DMA, DMF, and DMSO for 2, 3, and 4, respectively), [Mn 3 (4,4′-dimethyl-2,2′-bipy) 2 (4,4′-bpdcA single-crystal X-ray diffraction study revealed that the presence of phen led to solid 1 that contained 1D chains made of Mn(II)-carboxylate dimers. The auxiliary ligand 2,2′-bipy and its 4,4′-dimethyl derivatives in a suitable solvent led to the growth of the solids 2 and 5 with a trimeric manganese cluster, where the building block, 1:1 manganese carboxylate got extended into 2D sheet and 3D network, respectively. The ligand 2,2′-bipy with 5,5′-dimethyl substitution led to 1D anionic chains of the composition, [Mn(5,5′-dimethyl-2,2′-bipy)(4,4′-bpdc) 2 ] 2− , stabilized by the cationic complex, {Mn(5,5′dimethyl-2,2′-bipy)(H 2 O) 4 } 2+ in 6. As expected, the auxiliary ligand, 4,4′-bipy acted as a bridging unit to pillar 1D chains of manganese-carboxylate forming a 2D sheet in 7. Retro analysis of the various structures reported here provided a mechanistic approach not only to rationalize the crystal packing of manganese(II) 4,4′-benzophenone dicarboxylates but also to enhance the understanding of crystallization of manganese(II) 2,4′-benzophenone dicarboxylates and other related solids. We have also discussed the antiferromagnetic behavior of 1, 2, 5, and 7 in the context of other structurally related manganese(II) dicarboxylates.

show abstract

Layered Ag(I), Cd(II) and Cu(I) Luminescent Coordination Polymers Assembled Through a Tri‐Pyridyl Cyclic Triimidazole Ligand

Malpicci,

Blasi,

Forni

et al. 2024

Eur J Inorg Chem

View full text Add to dashboard Cite

The versatility of a nitrogen rich pyridinic derivative of the cyclic triimidazole scaffold with C3 symmetry is here exploited to obtain three luminescent coordination polymers (CPs). By reaction of 3,7,11‐tri(pyridin‐4‐yl)triimidazo[1,2‐a:1',2'‐c:1'',2''‐e][1,3,5]triazine, (4py)3TT, with Ag(I), Cd(II) and Cu(I) salts, [Ag{(4‐py)3TT}(SO3CF3)]n∙½nCH2Cl2 (1), [Cd{(4‐py)3TT}(NO3)2(EtOH)]n (2) and [(Cu2I2)3{(4‐py)3TT}4]n·xn(H2O, EtOH) (3) are obtained. The trigonal symmetry of (4py)3TT results in 2D structures with hcb topology in 1 and 2 and a rare 3,4‐connected (3,4‐c) topology in 3. The multifaceted emissive behaviour of the CPs and the free ligand has been investigated and interpreted through spectroscopic, structural and computational studies. The fluorescence and the high energy phosphorescence of 1, 2 and (4py)3TT itself are correlated to singlet and triplet excited states of molecular origin while their low energy phosphorescence derives from supramolecular entities associated with strong π‐π interactions with little metal contribution as is the case for the single phosphorescence observed for 3. In agreement, unusually long lifetimes in the ms regime are measured for crystals of all compounds.

show abstract

Auxiliary ligand-modulated trisimidazole-based coordination polymers: syntheses, structures and photoluminescence properties

Cited by 7 publications

References 154 publications

Multifunctional Cadmium-Based Metal–Organic Frameworks for the Detection of Ion and Molecule in Aqueous Media

Multifunctional Cadmium-Based Metal–Organic Frameworks for the Detection of Ion and Molecule in Aqueous Media

Crystallization and Magnetic Behavior of Manganese(II) 4,4′-Benzophenone Dicarboxylates and a Comparison of Its Structural Landscape with 2,4′-Benzophenone Dicarboxylate

Layered Ag(I), Cd(II) and Cu(I) Luminescent Coordination Polymers Assembled Through a Tri‐Pyridyl Cyclic Triimidazole Ligand

Contact Info

Product

Resources

About