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排序方式: 共有388条查询结果,搜索用时 15 毫秒
361.
Ramon Subiros-Funosas Vivian Cheuk Lam Ho Nicole D. Barth Lorena Mendive-Tapia Morena Pappalardo Xavier Barril Ruoyu Ma Cheng-Bin Zhang Bin-Zhi Qian Miquel Sintes Ouldouz Ghashghaei Rodolfo Lavilla Marc Vendrell 《Chemical science》2020,11(5):1368
Keratin 1 (KRT1) is overexpressed in squamous carcinomas and associated with aggressive pathologies in breast cancer. Herein we report the design and preparation of the first Trp-based red fluorogenic amino acid, which is synthetically accessible in a few steps and displays excellent photophysical properties, and its application in a minimally-disruptive labelling strategy to prepare a new fluorogenic cyclopeptide for imaging of KRT1+ cells in whole intact tumour tissues.Trp(redBODIPY) is the first red-emitting Trp-based amino acid for the preparation of fluorogenic peptides with retention of target binding affinity. 相似文献
362.
Lo WY Lam CH Yam VW Zhu N Cheung KK Fathallah S Messaoudi S Le Guennic B Kahlal S Halet JF 《Journal of the American Chemical Society》2004,126(23):7300-7310
A series of soluble trinuclear copper(I) and silver(I) complexes containing bicapped diynyl ligands, [M(3)(micro-dppm)(3)(micro(3)-eta(1)-C triple bond CC triple bond CR)(2)]PF(6) (M = Cu, R = Ph, C(6)H(4)-CH(3)-p, C(6)H(4)-OCH(3)-p, (n)C(6)H(13), H; M = Ag, R = Ph, C(6)H(4)-OCH(3)-p), has been synthesized and their electronic, photophysical, and electrochemical properties studied. The X-ray crystal structures of [Cu(3)(micro-dppm)(3)(micro(3)-eta(1)-C triple bond CC triple bond CPh)(2)]PF(6) and [Cu(3)(micro-dppm)(3)(micro(3)-eta(1)-C triple bond CC triple bond CH)(2)]PF(6) have been determined. 相似文献
363.
A series of luminescent dinuclear gold(I) complexes with different crown ether pendants, [Au(2)(PwedgeP)(S-B15C5)(2)] [S-B15C5 = 4'-mercaptobenzo-15-crown-5, P(wedge)P = bis(dicyclohexylphosphino)methane (dcpm) (1), bis(diphenylphosphino)methane (dppm) (2)] and [Au(2)(P(wedge)P)(S-B18C6)(2)] [S-B18C6 = 4'-mercaptobenzo-18-crown-6, P(wedge)P = dcpm (3), dppm (4)], and their related crown-free complexes, [Au(2)(P(wedge)P)(SC(6)H(3)(OMe)(2)-3,4)(2)] [P(wedge)P = dcpm (5), dppm (6)], were synthesized. The low-energy emission of the mercaptocrown ether-containing gold(I) complexes are tentatively assigned as originated from states derived from a S --> Au ligand-to-metal charge transfer (LMCT) transition. The crown ether-containing gold(I) complexes showed specific binding abilities toward various metal cations according to the ring size of the crown pendants. Spectroscopic evidence was provided for the metal-ion-induced switching on of the gold...gold interactions upon the binding of particular metal ions in a sandwich binding mode. 相似文献
364.
365.
366.
Chi-Hang Tao Vivian Wing-Wah Yam 《Journal of Photochemistry and Photobiology, C: Photochemistry Reviews》2009,10(3):130-140
In this review, the synthesis, electronic absorption and luminescent properties of a series of branched alkynylpalladium(II) and -platinum(II) phosphine complexes with different alkynyl backbones and some of their structurally related complexes in the literature will be discussed. With the growing research interest in the potential application of these complexes in the field of non-linear optics (NLO), the two-photon absorption (TPA) properties and the corresponding structure–property relationships of selected luminescent branched platinum(II) bis-alkynyl complexes will also be described. 相似文献
367.
A hexanuclear gold(I) selenido cluster and its sulfido counterpart, [Au6{μ‐Ph2PN(CH2‐o‐Py)PPh2}3(μ3‐E)2](ClO4)2 (E = S, Se), with bridging bis(diphenylphosphino)amine ligands were synthesized and characterized. The X‐ray crystal structure of the selenido cluster was determined, with the gold core possessing a distorted heterocubane structure. Intramolecular aurophilic interactions with short Au(I)?Au(I) contacts of around 3.09–3.13 Å were observed. The complexes were found to emit strongly in the solid state with orange to red emission colors. Their electronic absorption and emission properties were also investigated. 相似文献
368.
We investigate the effects of an external magnetic field in the gap structure of a color superconductor with three massless quark flavors. Using an effective theory with four-fermion interactions, inspired by one-gluon exchange, we show that the long-range component B of the external magnetic field that penetrates the color-flavor locked phase modifies its gap structure, producing a new phase of lower symmetry. A main outcome of our study is that the B field tends to strengthen the gaps formed by Q-charged and Q-neutral quarks that coupled among themselves through tree-level vertices. These gaps are enhanced by the field-dependent density of states of the Q-charged quarks on the Fermi surface. Our considerations are relevant for the study of highly magnetized compact stars. 相似文献
369.
370.
Vivian O'Brien 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1979,30(6):913-928
New exact laminar convective temperature solutions for rectangular ducts with constant heat flux per unit length have been derived in uniform fashion for a variety of Dirichlet and Neumann boundary conditions. Those with null Dirichlet boundary conditions satisfy the hypothesis of a general inequality theorem. Consequences of the theorem are shown for the velocity and thermal fields of rectangular and elliptical ducts, which provide rigorous bounds for intermediate contours.
Résumé Quelques solutions nouvelles exactes du problème de la convection laminaire de la chaleur dans les tuyaux de section rectangulaire ont été déduites d'une façon uniforme pour différentes conditions aux limites selon Dirichlet et Neumann. L'hypothèse d'un théorème général d'inégalité est satisfaite lorsque les conditions aux limites sont homogènes selon Dirichlet. Les conséquences de ce théorème sont montrées pour les champs de vitesse et de température dans les tuyaux rectangulaires et elliptiques, ce qui fournit des bornes précises pour des domaines intermédiaires.相似文献