Synthesis, crystal structure and luminescent properties of a new samarium-fluorescein metal-organic framework

Thomas, J.K.; Ambili, K. S.

doi:10.1016/j.molstruc.2015.06.023

Cited by 7 publications

(5 citation statements)

References 27 publications

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“…The bond lengths in the two carboxylate groups are C20-O4 = 1.221(5), C20-O5 = 1.263(5), C40-O9 = 1.239(5) and C40-O10 = 1.245(5) Å. The simultaneous presence of both mono-and dianions of fluorescein was previously reported for lanthanide coordination polymers[24].Crystals 2021, 11, x FOR PEER REVIEW 14 of 17 using a 4:3 molar ratio between fluorescein and diach (Figures S10-S13). Compound 10 is also a salt containing two types of fluorescein anions, mono-(HFl − ) and dianions (Fl 2− ), H2diach 2+ dications and crystallization water molecules (Figure 18).…”

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confidence: 54%

Cocrystals versus Salts of Fluorescein

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Mădălan

2021

Crystals

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A series of nitrogen-containing organic molecules (4,4’-bipyridyl; trans-1,2-bis(4-pyridyl)ethylene; 1,2-bis(4-pyridyl)ethane; 4-aminopyridine and trans-1,4-diaminocyclohexane) was envisaged for cocrystallization experiments together with fluorescein. These compounds, containing pyridyl or/and amino nitrogen atoms, can act either as hydrogen bond acceptors for the phenol groups of fluorescein-generating cocrystals or as proton acceptors forming organic salts. Five cocrystals were obtained with the partners containing only pyridyl groups: {(H2Fl)2(bipy)} (1); {(H2Fl)2(bipy)(MeOH)2} (2); {(H2Fl)2(bpete)(EtOH)2} (3); {(H2Fl)(bpete)} (4); {(H2Fl)(bpeta)} (5). The compounds bearing amino groups deprotonate fluorescein producing salts: [(HFl)(Hampy)]∙2H2O (6); [(HFl)(Hampy)] (7); [(Fl)(H2diach)]∙3H2O (8); [(HFl)2(H2diach)]∙2H2O∙EtOH (9); and [(HFl)2(Fl)2(H2diach)3]∙4H2O (10). Optical properties of the cocrystals and salts were investigated.

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confidence: 54%

Cocrystals versus Salts of Fluorescein

Răducă

Mădălan

2021

Crystals

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“…The wavelength of maximum emission peaks of 1 is largely red shifted as 164 nm compared with that of H 2 pydc. The redshift emissions are likely related to the intraligands luminescence emission [24,26]. The emission bands of lanthanides with aromatic pyridine carboxylate ligands have shown between 450 and 550 nm compared with that of previous studies [27,28].…”

Section: Luminescence Propertymentioning

confidence: 71%

Hydrothermal synthesis, structure, heterogeneous catalytic activity and photoluminescent properties of a novel homoleptic Sm(III)-organic framework

Yıldız

Felts

et al. 2016

Journal of Solid State Chemistry

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“…It is evident from the studies that along with the highly ordered coordination polymeric network of metal and ligand, the sensitizers like eosin Y, rose Bengal, rhodamine B, and fluorescein are crucial to drive the photocatalytic reaction. − However, the homogeneous nature of these dyes results in low stability due to their dissolution and self-degradation under photocatalytic reaction conditions in water. There are very rare instances where such dye molecules are part of the framework itself. − Out of these, only one example is reported for the HER, where an eosin Y-based MOF exhibited efficient photocatalytic activity for H 2 evolution from EtOH–water solvent under visible-light irradiation with a turnover number of 13,920 . The detailed photoelectrochemical properties of the MOF were not reported in the previous work.…”

Section: Introductionmentioning

confidence: 54%

Band Gap Modulation in Fluorescein-Based Isostructural Coordination Polymers for Enhanced Photocatalytic Hydrogen Evolution under Visible Light

Moi,

Chandra,

Maity

et al. 2023

Crystal Growth & Design

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Coordination polymers (CPs) and metal−organic frameworks (MOFs) have emerged as promising materials for the photocatalytic hydrogen evolution reaction (HER). The flexibility to choose the organic linkers or the metal center provides the scope to alter their various properties like light absorption capability, optical band gap, etc. In this context, the dye molecules are the best choice to be utilized as a linker due to their ability to absorb visible light. However, the CPs/MOFs containing the dye molecules as a backbone are rarely explored. Herein, two isostructural fluorescein-based CPs were reported and shown to be efficient photocatalysts for the HER under white light without using a cocatalyst or a sensitizer. Here, the dye molecule was strategically incorporated into the backbone of the CPs, [Cd(FC)(BPY)(H 2 O)] n (Cd-FCB) and [Mn(FC)-(BPY)(H 2 O)] n (Mn-FCB), and their efficiency as photocatalysts were explored. The band gap of the isostructural CPs was found to have a huge effect on their photocatalytic efficiency. The rate of hydrogen production was 71.6 μmol g −1 h −1 for Cd-FCB, and for Mn-FCB, it was three times higher, i.e., 224.1 μmol g −1 h −1 . The higher efficiency can be attributed to the extended visible light absorption as well as the lower band gap of Mn-FCB than that of Cd-FCB. Moreover, the longer lifetime of the photogenerated electrons in Mn-FCB as indicated by the time-resolved photoluminescence spectra also validates such higher activity.

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Synthesis, crystal structure and luminescent properties of a new samarium-fluorescein metal-organic framework

Cited by 7 publications

References 27 publications

Cocrystals versus Salts of Fluorescein

Cocrystals versus Salts of Fluorescein

Hydrothermal synthesis, structure, heterogeneous catalytic activity and photoluminescent properties of a novel homoleptic Sm(III)-organic framework

Band Gap Modulation in Fluorescein-Based Isostructural Coordination Polymers for Enhanced Photocatalytic Hydrogen Evolution under Visible Light

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