Manipulation of intramolecular hydrogen bonds in single-benzene derivatives: Esterase sensing, fluorescence patterning, and inkless writing

Cho, Eunbee; Lee, Taek Seung

doi:10.1016/j.snb.2020.128307

Cited by 13 publications

(5 citation statements)

References 42 publications

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“…The H 2 dobdc 2– linker has been used to prepare a range of photoluminescent MOFs, which are generally proposed to emit via an excited-state intramolecular proton transfer (ESIPT) pathway (Figure S10). − ,,,,− Consistently, CORN-MOF-1 (Mg) fluoresces intensely upon irradiation with UV light in the solid state, whereas Mg 2 (dobdc) and H 4 dobdc emit only weakly (Figure a). This initial observation demonstrates how subtle changes in MOF structurestemming from a simple increase in the synthesis concentrationcan significantly modulate MOF photophysical properties.…”

Section: Resultsmentioning

confidence: 68%

Kinetic Trapping of Photoluminescent Frameworks During High-Concentration Synthesis of Nonemissive Metal–Organic Frameworks

Halder,

Bain,

Pitt

et al. 2023

Chem. Mater.

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Section: Resultsmentioning

confidence: 68%

Kinetic Trapping of Photoluminescent Frameworks During High-Concentration Synthesis of Nonemissive Metal–Organic Frameworks

Halder,

Bain,

Pitt

et al. 2023

Chem. Mater.

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“…The H2dobdc 2− linker has been used to prepare a range of photoluminescent MOFs, which are generally proposed to emit via an excited state intramolecular proton transfer (ESIPT) pathway. [30][31][32]36,37,49,[63][64][65][66] Consistently, CORN-MOF-1 (Mg) fluoresces intensely upon irradiation with UV light in the solid state, whereas Mg2(dobdc) and H4dobdc emit only weakly (Figure 5). This initial observation demonstrates how subtle changes in MOF structure-stemming from a simple increase in the synthesis concentration-can significantly modulate MOF photophysical properties.…”

Section: Photophysical Analysis Of H4dobdc Corn-mof-1 (Mg) and Mg2(do...mentioning

confidence: 56%

Trapping of Photoluminescent Kinetic Intermediates During High-Concentration Synthesis of Non-Emissive Metal-Organic Frameworks

Halder

Bain

Pitt

et al. 2023

Preprint

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Metal-organic frameworks (MOFs) are porous, crystalline materials constructed from organic linkers and inorganic nodes with potential utility in gas separations, drug delivery, sensing, and catalysis. Small variations in MOF synthesis conditions can lead to a range of accessible frameworks with divergent chemical or photophysical properties. New meth-ods to controllably access phases with tailored properties would broaden the scope of MOFs that can be reliably prepared for specific applications. Herein, we demonstrate that simply increasing the reaction concentration during the solvother-mal synthesis of M2(dobdc) (M = Mg, Mn, Ni; dobdc4− = 2,5-dioxido-1,4-benzenedicarboxylate), also known as MOF-74, unexpectedly leads to trapping of a kinetic intermediate termed CORN-MOF-1 (CORN = Cornell University). In-depth spec-troscopic, crystallographic, and computational studies support that CORN-MOF-1 has a similar structure to M2(dobdc) but with partially protonated linkers and charge-balancing or coordinated formate groups in the pores. The resultant vari-ation in linker spacings causes CORN-MOF-1 (Mg) to be strongly photoluminescent in the solid state, whereas H4dobdc and Mg2(dobdc) are weakly emissive due to excimer formation. In addition, CORN-MOF-1 variants can be converted into high-quality samples of the thermodynamic M2(dobdc) phases by heating in N,N-dimethylformamide (DMF). Overall, our findings support that high-concentration synthesis provides a straightforward method to identify new kinetic MOF phas-es with different properties from known materials and to produce highly porous samples of MOFs, paving the way for the discovery and gram-scale synthesis of framework materials.

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“…The contact of enzymes with tar-rich coal provided more opportunities for coal biodegradation. Moreover, extracellular enzymes may directly oxidize aromatic compounds, open aromatic rings, and cleave the side chains of aromatic rings by introducing more C-O groups into the coal structure to substitute H in the aromatic ring [47]. According to GC-MS and FTIR analysis, the results showed that, during the degradation of oxidized coals by B. licheniformis, the aromatic ring and side chain alkyl in oxidized coals were broken and formed simple small molecular substances, such as alkanes, carboxylic acids, esters, and aromatic compounds.…”

Section: Mechanism Of Coal Biodegradation Under the Action Of Triton ...mentioning

confidence: 99%

Influences of Four Kinds of Surfactants on Biodegradations of Tar-Rich Coal in the Ordos Basin by Bacillus bicheniformis

Shen,

Liu,

Shi

et al. 2023

Microorganisms

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The biodegradation of tar-rich coal in the Ordos Basin was carried out by Bacillus licheniformis (B. licheniformis) under actions of four kinds of surfactants, namely, a biological surfactant (Rh), a nonionic surfactant (Triton X-100), an anionic surfactant (LAS), and a cationic surfactant (DTAB). The biodegradation rates under the actions of Triton X-100, LAS, Rh, DTAB, and the control group (without surfactant) were 59.8%, 54.3%, 51.6%, 17.3%, and 43.5%, respectively. The biodegradation mechanism was studied by examining the influences of surfactants on coal samples, bacteria, and degradation products in the degradation process. The results demonstrated that Rh, Triton X-100, and LAS could promote bacterial growth, while DTAB had the opposite effect. Four surfactants all increased the cell surface hydrophobicity (CSH) of B. licheniformis, and Triton X-100 demonstrated the most significant promotion of CSH. The order of improvement in microbial cell permeability by surfactants was DTAB > TritonX-100 > LAS > Rh > control group. In the presence of four surfactants, Triton X-100 exhibited the best hydrophilicity improvement for oxidized coal. Overall, among the four surfactants, Triton X-100 ranked first in enhancing the CSH of bacteria and the hydrophilicity of oxidized coal and second in improving microbial cell permeability; thus, Triton X-100 was the most suitable surfactant for promoting B. licheniformis’s biodegradation of tar-rich coal. The GC-MS showed that, after the action of Triton X-100, the amount of the identified degradation compounds in the toluene extract of the liquid product decreased by 16 compared to the control group, the amount of dichloromethane extract decreased by 6, and the amount of ethyl acetate extract increased by 6. Simultaneously, the contents of alkanes in the extracts of toluene and dichloromethane decreased, lipids increased, and ethyl acetate extract exhibited little change. The FTIR analysis of the coal sample suggested that, under the action of Triton X-100, compared to oxidized coal, the Har/H and A(CH2)/A(CH3) of the remaining coal decreased by 0.07 and 1.38, respectively, indicating that Triton X-100 enhanced the degradation of aromatic and aliphatic structures of oxidized coal. Therefore, adding a suitable surfactant can promote the biodegradation of tar-rich coal and enrich its degradation product.

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Manipulation of intramolecular hydrogen bonds in single-benzene derivatives: Esterase sensing, fluorescence patterning, and inkless writing

Cited by 13 publications

References 42 publications

Kinetic Trapping of Photoluminescent Frameworks During High-Concentration Synthesis of Nonemissive Metal–Organic Frameworks

Kinetic Trapping of Photoluminescent Frameworks During High-Concentration Synthesis of Nonemissive Metal–Organic Frameworks

Trapping of Photoluminescent Kinetic Intermediates During High-Concentration Synthesis of Non-Emissive Metal-Organic Frameworks

Influences of Four Kinds of Surfactants on Biodegradations of Tar-Rich Coal in the Ordos Basin by Bacillus bicheniformis

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