Porphyrin nanotubes composed of highly ordered molecular arrays prepared by anodic aluminum template method

Liu, Qingyun; Zhu, Ji-Qin; Sun, Tao; Zhou, Haiyang; Shao, Qian; Li, Guijiang; Liu, Xiaodong; Yin, Yansheng

doi:10.1039/c2ra21364h

Cited by 35 publications

(18 citation statements)

References 44 publications

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“…The naturally dried mineral precipitates in the experimental group were analyzed with X-ray diffraction (XRD, D/Max-RC, Rigaku, Tokyo, Japan). The scanning angle (2θ) of XRD ranged from 10 • to 90 • , with a step size of 0.02 • and a count time of 8 • min −1 [44][45][46][49][50][51][52][53][54]. The mineral phases of the precipitates were further determined by comparison with the standard data on the powder diffraction file (PDF) of the International Center for Diffraction Data (ICDD) by Jade 6.0 software.…”

Section: Characterization Of Precipitatesmentioning

confidence: 99%

Extracellular and Intracellular Biomineralization Induced by Bacillus licheniformis DB1-9 at Different Mg/Ca Molar Ratios

et al. 2018

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Biomineralization has become a research hotspot and attracted widespread attention in the field of carbonate sedimentology. In this study, precipitation of carbonate minerals was induced by Bacillus licheniformis DB1-9 bacteria, (identity confirmed with its phylogenetic tree), to further explore the biomineralization mechanisms. During experiments, lasting up to 24 days with varying Mg/Ca molar ratios and regular monitoring of conditions, ammonia and carbonic anhydrase are released by the bacteria, resulting in a pH increase. Carbonic anhydrase could have promoted carbon dioxide hydration to produce bicarbonate and carbonate ions, and so promoted supersaturation to facilitate the precipitation of carbonate minerals. These include rhombohedral, dumbbell-shaped, and elongated calcite crystals; aragonite appears in the form of mineral aggregates. In addition, spheroidal and fusiform minerals are precipitated. FTIR results show there are organic functional groups, such as C–O–C and C=O, as well as the characteristic peaks of calcite and aragonite; these indicate that there is a close relationship between the bacteria and the minerals. Ultrathin slices of the bacteria analyzed by HRTEM, SAED, EDS, and STEM show that precipitate within the extracellular polymeric substances (EPS) has a poor crystal structure, and intracellular granular areas have no crystal structure. Fluorescence intensity and STEM results show that calcium ions can be transported from the outside to the inside of the cells. This study provides further insights to our understanding of biomineralization mechanisms induced by microorganisms.

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Section: Characterization Of Precipitatesmentioning

confidence: 99%

Extracellular and Intracellular Biomineralization Induced by Bacillus licheniformis DB1-9 at Different Mg/Ca Molar Ratios

et al. 2018

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“…In order to determine the difference in the mineralogy of carbonate minerals between MgSO4 group and MgCl2 group, the minerals in MgSO4 group and MgCl2 group were analyzed by XRD (D/Max-RC, Rigaku, Japan) with the scanning angle from 10 o to 80 o , a step size of 0.02 and a count of 8 o /min [74][75][76][77][78][79][80]. The microscopic morphology, size and elemental composition of mineral in MgSO4 group and MgCl2 group were studied by SEM (Hitachi S-4800, Japan) and EDS (EDAX, America) [81][82][83][84], respectively.…”

Section: Analysis Of Carbonate Mineral Induced By S Epidermidis Y2 Imentioning

confidence: 99%

The Significant Role of Different Magnesium: Carbonate Minerals Induced by Moderate Halophile <em>Staphylococcus epidermis</em> Y2

Han¹,

Yu²,

Zhao³

et al. 2018

Preprint

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Carbonate precipitation induced by microorganism has become a hot spot in the field of carbonate sedimentology, while the effect of different magnesium on biominerals has rarely been studied. Therefore, magnesium sulfate and magnesium chloride were used to investigate the significant role played on carbonate minerals. In this study, Staphylococcus epidermidis Y2 was isolated and identified by 16S rDNA homology comparison. The ammonia, pH, carbonic anhydrase, carbonate and bicarbonate ions were investigated. The mineral phase, morphology and elemental composition were analyzed by XRD and SEM-EDS. The ultrathin slices of bacteria were analyzed by HRTEM-SAED and STEM. The result showed that this bacterium could release ammonia and carbonic anhydrase to increase pH, and elevate the supersaturation via a large number of carbonate and bicarbonate ions released through carbon dioxide hydration catalyzed by carbonic anhydrase. The crystal cell density of monohydrocalcite was lower in magnesium chloride medium than that in magnesium sulfate medium. The crystal grew in a mode of spiral staircas in magnesium sulfate medium, while in a concentric circular pattern in magnesium chloride medium. There was no obvious intracellular biomineralization. This study may be helpful to further understand the biomineralization mechanism, may also provide some references for the reconstruction of paleogeological environment.

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“…Porphyrin nanostructures offer a challenging alternative to material nanotubes in addition to peptide and other biomaterial nanotubes. The involvement of porphyrin‐based nanostructures in many biological processes and the possibility to tailor their physical and chemical properties, including polarizability, absorption spectrum, energy transfer, and catalytic properties, at the molecular level make them extremely versatile synthetic materials in many disciplines of science like electronics, photophysics catalysis and nonlinear studies . More interestingly, the porphyrin nanostructures were found to act as effective excitonic antennas or photon concentrators for visible light with both the allowed axial and radial transitions, which make them unique compared to inorganic nanowires, carbon nanotubes, and so on.…”

Section: Introductionmentioning

confidence: 99%

“…There are many studies that demonstrate the formation of nanostructures based on porphyrin derivatives . Several meso‐tetraphenyl‐based porphyrins (TPPS) such as, for instance, TPPS2 (bi(4‐sulfonatophenyl)diphenylporphyrin), TPPS3 (tri(4‐sulfonatophenyl) phenylporphyrin), TClPP (tetra(4‐chlorophenyl) porphyrin), TPPS4 (tetra(4‐sulfonatophenyl)porphyrin), and TCPP porphyrins, were found to form aggregates in tubular patterns. Subsequently, researchers from diverse groups have identified nanotubular structures from various other porphyrin derivatives such as zinc‐tetra (4‐pyridyl) porphyrin (ZnTPyP), 5,10,15,20‐tetrakis(4‐chlorophenyl)porphyrin (H2TClPP), and so on.…”

Section: Introductionmentioning

confidence: 99%

Quantum Chemical Study on the Structure and Energetics of Binary Ionic Porphyrin Complexes

Jayachandran¹,

Angamuthu

Gopalan³

2018

J Chinese Chemical Soc

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In this paper, the structural and energetical properties of binary porphyrin complexes are studied employing quantum chemical techniques. The molecular electrostatic potential maps along with the obtained energetical parameters indicate the importance of axial ligands and pyridine H atoms that necessitate for the formation of perfectly stacked binary ionic porphyrin layers. An insight on the underlying quantum processes will present new

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Porphyrin nanotubes composed of highly ordered molecular arrays prepared by anodic aluminum template method

Cited by 35 publications

References 44 publications

Extracellular and Intracellular Biomineralization Induced by Bacillus licheniformis DB1-9 at Different Mg/Ca Molar Ratios

Extracellular and Intracellular Biomineralization Induced by Bacillus licheniformis DB1-9 at Different Mg/Ca Molar Ratios

The Significant Role of Different Magnesium: Carbonate Minerals Induced by Moderate Halophile <em>Staphylococcus epidermis</em> Y2

Quantum Chemical Study on the Structure and Energetics of Binary Ionic Porphyrin Complexes

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