Columnar discotic Pt(ii) metallomesogens as luminescence multifunctional materials with chemo and thermosensor abilities

2014 ◽  
Vol 2 (43) ◽  
pp. 9167-9181 ◽  
Author(s):  
Cristián Cuerva ◽  
José A. Campo ◽  
Paloma Ovejero ◽  
M. Rosario Torres ◽  
Elisabete Oliveira ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Multifunctional Materials ◽  
New Family

A new family of Pt(ii) luminescent metallomesogens based on dicatenar pyridylpyrazolate ligands [Pt(pzR(n,n)py)2] (R(n,n) = C6H3(OCnH2n+1)2,n= 4–18) has been prepared, and their mesomorphic and photophysical properties are described.

Synthesis, photophysical properties and cation-binding studies of bipyridine-functionalized gold(i) complexes

2018 ◽  
Vol 5 (1) ◽  
pp. 160-171 ◽  
Author(s):  
Igor V. Solovyev ◽  
Aleksandar Kondinski ◽  
Kirill Yu. Monakhov ◽  
Igor O. Koshevoy ◽  
Elena V. Grachova
Keyword(s):  
Photophysical Properties ◽  
Cation Binding ◽  
Binding Studies ◽  
New Family ◽  
Bright Luminescence

A new family of Au(i) complexes equipped with bipyridine function demonstrate bright luminescence response to M(ii) cations in solution.

scholarly journals Synthesis and Spectral Study of a New Family of 2,5-Diaryltriazoles Having Restricted Rotation of the 5-Aryl Substituent

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 480 ◽  
Author(s):  
Biligma Tsyrenova ◽  
Valentine Nenajdenko
Keyword(s):  
Heterocyclic System ◽  
Photophysical Properties ◽  
System Structure ◽  
Quantum Yields ◽  
Aryl Substituent ◽  
Light Emitting ◽  
New Family ◽  
Aryl Fragment ◽  
New Type ◽  
Condensed Heterocycles

Efficient synthesis of 2,5-diaryl substituted 4-azido-1,2,3-triazoles by the reaction of sodium azide with dichlorosubstituted diazadienes was demonstrated. The optical properties of the prepared azidotriazoles were studied to reveal a luminescence maximum in the 360–420 nm region. To improve the luminescence quantum yields a family of 4-azido-1,2,3-triazoles bearing ortho-propargyloxy substituents in the 5 position was prepared. Subsequent intramolecular thermal cyclization permits to construct additional triazole fragment and obtain unique benzoxazocine derivatives condensed with two triazole rings. This new family of condensed heterocycles has a flattened heterocyclic system structure to provide more conjugation of the 5-aryl fragment with the triazole core. As a result, a new type of UV/“blue light-emitting” materials with better photophysical properties was obtained.

Fluorophores based on a minimal thienylthiazole core: towards multifunctional materials with solid state red emissions, solvatochromism and AIE behaviour

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32705-32709 ◽  
Author(s):  
Rakesh Radhakrishnan ◽  
Kumaran G. Sreejalekshmi
Keyword(s):  
Solid State ◽  
Photophysical Properties ◽  
Multifunctional Materials

Minimal architecture solid red emissive D–A–D–A tetrads were built on a thienylthiazole core and their photophysical properties were investigated.

scholarly journals Application of Boroisoquinoline Fluorophores as Chemodosimeters for Fluoride Ion and Pd (0)

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 199 ◽  
Author(s):  
Dénes Sóvári ◽  
György Miklós Keserű ◽  
Péter Ábrányi-Balogh
Keyword(s):  
Organic Chemistry ◽  
Mechanism Of Action ◽  
Photophysical Properties ◽  
Fluoride Anion ◽  
Fluoride Ion ◽  
New Family

The development of novel chemodosimeters is currently a prosperous field in organic chemistry. Recently, a new family of fluorophores, the boroisoquinolines, were introduced with satisfying photophysical properties. As a continuation of this research, the application of boroisoquinolines is presented as chemodosimeters for fluoride anion and Pd (0). The new tools showed good selectivity for the detection of the analytes. Moreover, the mechanism of action was investigated experimentally.

A photoswitchable bichromophoric oxazine with fast switching speeds and excellent fatigue resistance

2011 ◽  
Vol 89 (2) ◽  
pp. 110-116 ◽  
Author(s):  
Erhan Deniz ◽  
Stefania Impellizzeri ◽  
Salvatore Sortino ◽  
Françisco M. Raymo
Keyword(s):  
Structural Design ◽  
Photophysical Properties ◽  
Visible Region ◽  
Original Form ◽  
First Order ◽  
Rigid Polymer ◽  
Fast Switching ◽  
New Family ◽  
First Order Kinetics ◽  
Oxazine Ring

In search of strategies to regulate the photochemical and photophysical properties of photochromic oxazines, we designed a multichromophoric compound incorporating 3H-indole, benzooxazine, and 2-(4-dimethylaminophenyl)ethynyl fragments. We synthesized this molecule in two steps in an overall yield of 51%, starting from commercial precursors. The ultraviolet irradiation of this photochrome opens a [1,3]oxazine ring in less than 6 ns to generate a zwitterionic isomer with a quantum yield of 0.10. In particular, the photoinduced ring opening generates a 4-nitrophenolate anion and a 3H-indolium cation. Additionally, this process brings the 2-(4-dimethylaminophenyl)ethynyl appendage into conjugation with the 3H-indolium cation. As a result, two distinct bands for the anionic and cationic fragments of the photogenerated zwitterion appear in the visible region of the absorption spectrum. The photogenerated isomer has a lifetime of 2 µs and switches back to the original form with first-order kinetics. Furthermore, this bichromophoric photochrome tolerates hundreds of switching cycles with no sign of degradation and can be operated within rigid polymer matrices. Thus, this particular structural design can lead to the development of a new family of bichromophoric photochromes and photoresponsive materials with microsecond switching times and excellent fatigue resistances.

Microstructure and crystal symmetry of Pb2Sr2(Y/Ca)Cu3O9−δ

1990 ◽  
Vol 48 (4) ◽  
pp. 64-65
Author(s):  
Y. P. Lin ◽  
J. S. Xue ◽  
J. E. Greedan
Keyword(s):  
Electron Diffraction ◽  
High Temperature Superconductors ◽  
Carbon Film ◽  
Basic Structure ◽  
Crystal Symmetry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Space Groups ◽  
New Family ◽  
Convergent Beam

A new family of high temperature superconductors based on Pb2Sr2YCu3O9−δ has recently been reported. One method of improving Tc has been to replace Y partially with Ca. Although the basic structure of this type of superconductors is known, the detailed structure is still unclear, and various space groups has been proposed. In our work, crystals of Pb2Sr2YCu3O9−δ with dimensions up to 1 × 1 × 0.25.mm and with Tc of 84 K have been grown and their superconducting properties described. The defects and crystal symmetry have been investigated using electron microscopy performed on crushed crystals supported on a holey carbon film.Electron diffraction confirmed x-ray diffraction results which showed that the crystals are primitive orthorhombic with a=0.5383, b=0.5423 and c=1.5765 nm. Convergent Beam Electron Diffraction (CBED) patterns for the and axes are shown in Figs. 1 and 2 respectively.

A new family of fluorescent calcium indicators designed to resist leakage or for measuring calcium near membranes

1994 ◽  
Vol 52 ◽  
pp. 168-169
Author(s):  
Martin Poenie ◽  
Akwasi Minta ◽  
Charles Vorndran
Keyword(s):  
Metal Binding ◽  
Acetoxymethyl Ester ◽  
Binding Properties ◽  
Fura 2 ◽  
New Family ◽  
Anion Transporter ◽  
Calcium Indicator ◽  
Calcium Indicators ◽  
High Calcium ◽  
Intracellular Compartmentalization

The use of fura-2 as an intracellular calcium indicator is complicated by problems of rapid dye leakage and intracellular compartmentalization which is due to a probenecid sensitive anion transporter. In addition there is increasing evidence for localized microdomains of high calcium signals which may not be faithfully reported by fura-2.We have developed a new family of fura-2 analogs aimed at addressing some of these problems. These new indicators are based on a modified bapta which can be readily derivatized to produce fura-2 analogs with a variety of new properties. The modifications do not affect the chromophore and have little impact on the spectral and metal binding properties of the indicator. One of these new derivatives known as FPE3 is a zwitterionic analog of fura-2 that can be loaded into cells as an acetoxymethyl ester and whose retention in cells is much improved. The improved retention of FPE3 is important for both cuvettebased measurements of cell suspensions and for calcium imaging.

Scanning tunneling microscopy and atomic force microscopy: New tools for biology

1989 ◽  
Vol 47 ◽  
pp. 778-779
Author(s):  
CE Bracker ◽  
P. K. Hansma
Keyword(s):  
Physical Property ◽  
Scanning Probe ◽  
Scanning Tunneling ◽  
Small Scale ◽  
Tunneling Microscopy ◽  
Force Microscopy ◽  
New Family ◽  
Small Probe ◽  
Atomic Force ◽  
Transmission Electron

A new family of scanning probe microscopes has emerged that is opening new horizons for investigating the fine structure of matter. The earliest and best known of these instruments is the scanning tunneling microscope (STM). First published in 1982, the STM earned the 1986 Nobel Prize in Physics for two of its inventors, G. Binnig and H. Rohrer. They shared the prize with E. Ruska for his work that had led to the development of the transmission electron microscope half a century earlier. It seems appropriate that the award embodied this particular blend of the old and the new because it demonstrated to the world a long overdue respect for the enormous contributions electron microscopy has made to the understanding of matter, and at the same time it signalled the dawn of a new age in microscopy. What we are seeing is a revolution in microscopy and a redefinition of the concept of a microscope.Several kinds of scanning probe microscopes now exist, and the number is increasing. What they share in common is a small probe that is scanned over the surface of a specimen and measures a physical property on a very small scale, at or near the surface. Scanning probes can measure temperature, magnetic fields, tunneling currents, voltage, force, and ion currents, among others.

Porphyrin-functionalized coordination star polymers and their potential applications in photodynamic therapy

2019 ◽  
Vol 10 (45) ◽  
pp. 6116-6121 ◽  
Author(s):  
Tan Ji ◽  
Lei Xia ◽  
Wei Zheng ◽  
Guang-Qiang Yin ◽  
Tao Yue ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Self Assembly ◽  
Star Polymers ◽  
New Family ◽  
Potential Applications

We present a new family of porphyrin-functionalized coordination star polymers prepared through combination of coordination-driven self-assembly and post-assembly polymerization. Their self-assembly behaviour in water and potential for photodynamic therapy were demonstrated.

A Look at Work and the New Family

1985 ◽  
Vol 30 (6) ◽  
pp. 497-498
Author(s):  
Carol C. Nadelson
Keyword(s):  
New Family
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