Hybrid Inorganic–Organic Polyrotaxane, Pseudorotaxane, and Sandwich

Inorganic copper­(I)/silver­(I) halide/pseudohalide components are used to thread classical organic tetracationic macrocycles, cyclobis­(paraquat-<i>p</i>-phenylene) and cyclobis­(paraquat-4,4′-biphenylene), to construct crystalline inorganic–organic adducts, featuring an unprecedented hybrid polyrotaxane and several unusual hybrid pseudorotaxanes and sandwiches

Gyroidal Metal–Organic Frameworks

The gyroid is ubiquitous for underlying the construction of natural substance and artificial zeolites, but it has been, surprisingly, overlooked by chemists who work in the field of metal–organic frameworks (MOFs). In this work, a series of gyroidal MOFs with <b>gie</b> topology, constructed from 1,2-bis((5<i>H</i>-imidazol-4-yl)methylene)hydrazine and octahedral metal ions, such as Zn^II, Mn^II, Cu^II, and Ni^II, have been synthesized. The Zn^II analogue, named as STU-1, shows exceptional thermal and chemical stabilities, and exhibits permanent porosity and CO₂ capture ability

Structures of Metal–Organic Frameworks with Rod Secondary Building Units

Rod MOFs are metal–organic frameworks in which the metal-containing secondary building units consist of infinite rods of linked metal-centered polyhedra. For such materials, we identify the points of extension, often atoms, which define the interface between the organic and inorganic components of the structure. The pattern of points of extension defines a shape such as a helix, ladder, helical ribbon, or cylinder tiling. The linkage of these shapes into a three-dimensional framework in turn defines a net characteristic of the original structure. Some scores of rod MOF structures are illustrated and deconstructed into their underlying nets in this way. Crystallographic data for all nets in their maximum symmetry embeddings are provided

The entrapment percentage and efficiency as a function of AMG concentration

<p><b>Copyright information:</b></p><p>Taken from "Amyloglucosidase enzymatic reactivity inside lipid vesicles"</p><p>http://www.jbioleng.org/content/1/1/4</p><p>Journal of Biological Engineering 2007;1():4-4.</p><p>Published online 10 Oct 2007</p><p>PMCID:PMC2241828.</p><p></p> Filled circle (red circle): Entrapment percent. Filled square (blue square): Entrapment efficiency

Mechanically Triggered Fluorescence/Phosphorescence Switching in the Excimers of Planar Trinuclear Copper(I) Pyrazolate Complexes

Luminescence mechanochromism of the well-known Cu₃Pz₃-type (Pz = pyrazolate) complexes is reported here, which is unusual for this family. Two types of new Cu₃Pz₃ complexes, namely Cu₃(EBPz)₃ (<b>1</b>; EBPz = ethyl-4′-benzoate-3,5-dimethylpyrazolate) and Cu₃(MBPz)₃ (polymorphs <b>2a</b>–<b>c</b>; MBPz = methyl-4′-benzoate-3,5-dimethylpyrazolate), have been synthesized and characterized. Their crystal structures exhibit a similar chairlike dimer stacking supported by short Cu···Cu contacts, which would facilitate the formation of photoinduced excimers. The dual emission from the organic fluorophore and excimeric copper cluster phosphor is found to undergo mechanically induced intensity switching between their high-energy (HE) and low-energy (LE) bands. Specifically, the relative intensities of crystalline samples are HE > LE, while the ground solid samples show LE > HE, resulting in the overall emission color interchanging between bluish violet and red. This switching can be reversed by application of solvent to the ground samples, presumably due to recrystallization, and also by heating. TD-DFT calculations reveal that the emissive singlet ligand localized state (S₁) and triplet cluster centered state (T₈) lie close in energy (separated by a gap of 0.1788 eV), suggesting the feasibility of dual emission and the possibility of reverse intersystem crossing, consistent with the long fluorescent lifetimes (10² ns scale) of the HE bands

Mechanically Triggered Fluorescence/Phosphorescence Switching in the Excimers of Planar Trinuclear Copper(I) Pyrazolate Complexes

Luminescence mechanochromism of the well-known Cu₃Pz₃-type (Pz = pyrazolate) complexes is reported here, which is unusual for this family. Two types of new Cu₃Pz₃ complexes, namely Cu₃(EBPz)₃ (<b>1</b>; EBPz = ethyl-4′-benzoate-3,5-dimethylpyrazolate) and Cu₃(MBPz)₃ (polymorphs <b>2a</b>–<b>c</b>; MBPz = methyl-4′-benzoate-3,5-dimethylpyrazolate), have been synthesized and characterized. Their crystal structures exhibit a similar chairlike dimer stacking supported by short Cu···Cu contacts, which would facilitate the formation of photoinduced excimers. The dual emission from the organic fluorophore and excimeric copper cluster phosphor is found to undergo mechanically induced intensity switching between their high-energy (HE) and low-energy (LE) bands. Specifically, the relative intensities of crystalline samples are HE > LE, while the ground solid samples show LE > HE, resulting in the overall emission color interchanging between bluish violet and red. This switching can be reversed by application of solvent to the ground samples, presumably due to recrystallization, and also by heating. TD-DFT calculations reveal that the emissive singlet ligand localized state (S₁) and triplet cluster centered state (T₈) lie close in energy (separated by a gap of 0.1788 eV), suggesting the feasibility of dual emission and the possibility of reverse intersystem crossing, consistent with the long fluorescent lifetimes (10² ns scale) of the HE bands

Flow chart for the literature search in the meta-analysis.

<p>Flow chart for the literature search in the meta-analysis.</p

Forest plot for the association between variant FokI in the VDR and risk of ovarian cancer (TT vs. CC).

<p>NECC, new England case-control study; NHS, nurses’ health study; WHS, women’s health study; MALOVA, malignant ovarian cancer study; SEARCH, studies of epidemiology and risk factors in cancer heredity: ovarian cancer study; GEOCS, genetic epidemiology of ovarian cancer study; UKOPS, united kingdom ovarian cancer population study.</p

Associations between VDR polymorphisms (ApaI, BsmI, Cdx-2, FokI, TaqI) and the risk of ovarian cancer under different genetic models.

<p>Associations between VDR polymorphisms (ApaI, BsmI, Cdx-2, FokI, TaqI) and the risk of ovarian cancer under different genetic models.</p

Characteristics of publications identified for the meta-analysis.

<p><b>Abbreviations:</b> PB, population-based case-control study; NCC, nested case-control study; PCR-RFLP, polymerase chain reaction-restriction fragment length polymorphism; NECC, new England case-control study; NHS, nurses’ health study; WHS, women’s health study; MALOVA, malignant ovarian cancer study; SEARCH, studies of epidemiology and risk factors in cancer heredity: ovarian cancer study; GEOCS, genetic epidemiology of ovarian cancer study; HAW, Hawaii ovarian cancer study; UKOPS, united kingdom ovarian cancer population study.</p