Synthesis of new quinolizinium-based fluorescent compounds and application studies on photocatalysis

2021 ◽  
Author(s):  
Man Kin Wong ◽  
Wai-Ming Yip ◽  
Qiong Yu ◽  
Ajcharapan Tantipanjaporn ◽  
Wing-Cheung Chan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Fluorescent Dyes ◽  
Aromatic Heterocycles ◽  
Dna Intercalators ◽  
Research Areas ◽  
Bridgehead Nitrogen ◽  
Fluorescent Compounds

Quinoliziniums, cationic aromatic heterocycles bearing a quaternary bridgehead nitrogen, have been widely applied to research areas, such as fluorescent dyes, DNA intercalators and ionic liquids. A library of new quinolizinium...

Synthesis and photophysical properties of pyrene-based green fluorescent dyes: butterfly-shaped architectures

2014 ◽  
Vol 12 (40) ◽  
pp. 7914-7918 ◽  
Author(s):  
Devendar Goud Vanga ◽  
Mithun Santra ◽  
Ashok Keerthi ◽  
Suresh Valiyaveettil
Keyword(s):  
Fluorescent Dyes ◽  
Photophysical Properties ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Cross Coupling Reaction ◽  
Green Fluorescent ◽  
Fluorescent Compounds

A few pyrene-based fluorescent compounds were synthesized using Pd/Cu-catalyzed cross-coupling reaction.

scholarly journals Group of Uniform Materials Based on Organic Salts (GUMBOS): A Review of Their Solid State Properties and Applications

2021 ◽  
Author(s):  
Rocío L. Pérez ◽  
Caitlan E. Ayala ◽  
Isiah M. Warner
Keyword(s):  
Ionic Liquids ◽  
Solid State ◽  
Solid Phase ◽  
Fine Tuning ◽  
Organic Salts ◽  
Research Areas ◽  
Ionic Compounds ◽  
Ionic Materials ◽  
Recent Developments ◽  
State Ionic

Ionic liquids (ILs) are defined as organic salts with melting points below 100 °C. Such ionic compounds are typically formed using bulky cations and/or bulky anions in order to produce liquids or lower melting solids. ILs have been widely explored in several research areas including catalysis, remediation, solvents, separations, and many others. The utility of such compounds has also been recently broadened to include solid phase ionic materials. Thus, researchers have pushed the boundaries of ILs chemistry toward the solid state and have hypothesized that valuable properties of ILs can be preserved and fine-tuned to achieve comparable properties in the solid state. In addition, as with ILs, tunability of these solid-phase materials can be achieved through simple counterion metathesis reactions. These solid-state forms of ILs have been designated as a group of uniform materials based on organic salts (GUMBOS). In contrast to ILs, these materials have an expanded melting point range of 25 to 250 °C. In this chapter, we focus on recent developments and studies from the literature that provide for fine tuning and enhancing properties through transformation and recycling of diverse ionic compounds such as dyes, antibiotics, and others into solid state ionic materials of greater utility.

Recent Advances in Applications of Supported Ionic Liquids

2020 ◽  
Vol 23 (26) ◽  
pp. 2881-2915 ◽  
Author(s):  
Pawanpreet Kaur ◽  
Harish Kumar Chopra
Keyword(s):  
Ionic Liquids ◽  
Green Synthesis ◽  
Co2 Fixation ◽  
Published Data ◽  
Chemical Transformations ◽  
Supported Membranes ◽  
Separation Science ◽  
Research Areas ◽  
Main Emphasis ◽  
Supported Ionic Liquids

: The supported ionic liquids have shown immense potential for numerous applications in catalysis and separation science. In the present review, the remarkable contribution of supported ionic liquids has been highlighted. The main emphasis has been laid on describing the facile separation of gas from binary gas mixtures owing to the capability of selective transport of permeable gases across supported membranes and removal of environmentally hazard sulfur compounds from fuels. The catalytic action of supported ionic liquids has been discussed in other applications such as biodiesel (biofuel) synthesis by transesterification/esterification processes, waste CO2 fixation into advantageous cyclic carbonates, and various chemical transformations in organic green synthesis. This review enclosed a maximum of the published data of the last ten years and also recently accomplished work concerning applications in various research areas like separation sciences, chemical transformations in organic green synthesis, biofuel synthesis, waste CO2 fixation, and purification of fuels by desulfurization.

scholarly journals Ionic Liquid-Based Quartz Crystal Microbalance Sensors for Organic Vapors: A Tutorial Review

Chemosensors ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 194
Author(s):  
Bishnu P. Regmi ◽  
Puspa L. Adhikari ◽  
Beni B. Dangi
Keyword(s):  
Ionic Liquids ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Sensor Arrays ◽  
Chemical Properties ◽  
Short Review ◽  
Future Research ◽  
Virtual Sensor ◽  
Research Areas ◽  
Biomedical Diagnostics

Organic vapor sensors are used in diverse applications ranging from environmental monitoring to biomedical diagnostics. Among a number of these sensors, quartz crystal microbalance (QCM) sensors prepared by coating ionic liquids (ILs) or their composites are promising devices for the analysis of volatile organic compounds (VOCs) in complex chemical mixtures. Ionic liquids are remarkable materials, which exhibit tunable physico-chemical properties, chemical and thermal stability, multiple interactions with diverse group of molecules, and enormous structural variability. Moreover, ILs exhibit viscoelastic properties, and hence these materials are ideal for creation of QCM virtual sensor arrays. While the scientific literature on IL-coated QCM sensors is rapidly growing, there is still much to learn. This manuscript provides a comprehensive review on the development of IL-coated QCM sensors and multi-sensor arrays as well as their applications for the analysis of VOCs in complex mixtures. Furthermore, IL-coated QCM virtual sensor arrays and their applications are presented. A short overview of some of the QCM designs, future research areas, and recommendations are also discussed. This short review is a necessary first step towards standardization and further development of QCM for the analysis of VOCs.

scholarly journals A Review of Process Systems Engineering (PSE) Tools for the Design of Ionic Liquids and Integrated Biorefineries

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1678
Author(s):  
Nishanth G. Chemmangattuvalappil ◽  
Denny K. S. Ng ◽  
Lik Yin Ng ◽  
Jecksin Ooi ◽  
Jia Wen Chong ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Systems Engineering ◽  
Molecular Design ◽  
Value Added ◽  
Process Systems Engineering ◽  
Computational Tools ◽  
Process Systems ◽  
Research Areas ◽  
Research Fields ◽  
Recent Developments

In this review paper, a brief overview of the increasing applicability of Process Systems Engineering (PSE) tools in two research areas, which are the design of ionic liquids and the design of integrated biorefineries, is presented. The development and advances of novel computational tools and optimization approaches in recent years have enabled these applications with practical results. A general introduction to ionic liquids and their various applications is presented followed by the major challenges in the design of optimal ionic liquids. Significant improvements in computational efficiency have made it possible to provide more reliable data for optimal system design, minimize the production cost of ionic liquids, and reduce the environmental impact caused by such solvents. Hence, the development of novel computational tools and optimization tools that contribute to the design of ionic liquids have been reviewed in detail. A detailed review of the recent developments in PSE applications in the field of integrated biorefineries is then presented. Various value-added products could be processed by the integrated biorefinery aided with applications of PSE tools with the aim of enhancing the sustainability performance in terms of economic, environmental, and social impacts. The application of molecular design tools in the design of integrated biorefineries is also highlighted. Major developments in the application of ionic liquids in integrated biorefineries have been emphasized. This paper is concluded by highlighting the major opportunities for further research in these two research areas and the areas for possible integration of these research fields.

Imidazopyridinium cations: A new family of azonia aromatic heterocycles with applications as DNA intercalators

2017 ◽  
Vol 138 ◽  
pp. 135-146 ◽  
Author(s):  
Pedro Bosch ◽  
Verónica García ◽  
Başak S. Bilen ◽  
David Sucunza ◽  
Alberto Domingo ◽  
...  
Keyword(s):  
Aromatic Heterocycles ◽  
Dna Intercalators ◽  
New Family

New series of non-toxic DNA intercalators, mitochondria targeting fluorescent dyes

2018 ◽  
Vol 148 ◽  
pp. 452-459 ◽  
Author(s):  
Atanas Kurutos ◽  
Iva Orehovec ◽  
Ana Tomašić Paić ◽  
Ivo Crnolatac ◽  
Lucija Horvat ◽  
...  
Keyword(s):  
Fluorescent Dyes ◽  
Dna Intercalators ◽  
Mitochondria Targeting

Conformation of Ribosomes from Escherichia Coli

1974 ◽  
Vol 32 ◽  
pp. 210-211
Author(s):  
M. Boublik ◽  
W. Hellmann ◽  
F. Jenkins
Keyword(s):  
Binding Sites ◽  
Ribosomal Proteins ◽  
Fluorescent Dyes ◽  
Protein Biosynthesis ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Dimensional Structure ◽  
Complete Understanding ◽  
And Function

The present knowledge of the three-dimensional structure of ribosomes is far too limited to enable a complete understanding of the various roles which ribosomes play in protein biosynthesis. The spatial arrangement of proteins and ribonuclec acids in ribosomes can be analysed in many ways. Determination of binding sites for individual proteins on ribonuclec acid and locations of the mutual positions of proteins on the ribosome using labeling with fluorescent dyes, cross-linking reagents, neutron-diffraction or antibodies against ribosomal proteins seem to be most successful approaches. Structure and function of ribosomes can be correlated be depleting the complete ribosomes of some proteins to the functionally inactive core and by subsequent partial reconstitution in order to regain active ribosomal particles.

Analysis of 3-d molecular distribution with the digital imaging microscope

1988 ◽  
Vol 46 ◽  
pp. 40-41
Author(s):  
W.A. Carrington ◽  
F.S. Fay ◽  
K.E. Fogarty ◽  
L. Lifshitz
Keyword(s):  
Image Restoration ◽  
Digital Imaging ◽  
Fluorescent Dyes ◽  
Optical Axis ◽  
Computer Hardware ◽  
Computer Algorithms ◽  
Low Contrast ◽  
Specific Proteins ◽  
Effective Use ◽  
Single Living Cells

Advances in digital imaging microscopy and in the synthesis of fluorescent dyes allow the determination of 3D distribution of specific proteins, ions, GNA or DNA in single living cells. Effective use of this technology requires a combination of optical and computer hardware and software for image restoration, feature extraction and computer graphics.The digital imaging microscope consists of a conventional epifluorescence microscope with computer controlled focus, excitation and emission wavelength and duration of excitation. Images are recorded with a cooled (-80°C) CCD. 3D images are obtained as a series of optical sections at .25 - .5 μm intervals.A conventional microscope has substantial blurring along its optical axis. Out of focus contributions to a single optical section cause low contrast and flare; details are poorly resolved along the optical axis. We have developed new computer algorithms for reversing these distortions. These image restoration techniques and scanning confocal microscopes yield significantly better images; the results from the two are comparable.

High-resolution measurement of birefringent fine structure in living cells using a new polarized light microscope

1995 ◽  
Vol 53 ◽  
pp. 54-55
Author(s):  
Rudolf Oldenbourg
Keyword(s):  
Light Microscope ◽  
Fluorescent Dyes ◽  
Polarized Light ◽  
Processing System ◽  
Video Camera ◽  
Molecular Organization ◽  
Computer Assisted ◽  
Image Recording ◽  
Birefringent Crystal ◽  
Technological Advances

The recent renaissance of the light microsope is fueled in part by technological advances in components on the periphery of the microscope, such as the laser as illumination source, electronic image recording (video), computer assisted image analysis and the biochemistry of fluorescent dyes for labeling specimens. After great progress in these peripheral parts, it seems timely to examine the optics itself and ask how progress in the periphery facilitates the use of new optical components and of new optical designs inside the microscope. Some results of this fruitful reflection are presented in this symposium.We have considered the polarized light microscope, and developed a design that replaces the traditional compensator, typically a birefringent crystal plate, with a precision universal compensator made of two liquid crystal variable retarders. A video camera and digital image processing system provide fast measurements of specimen anisotropy (retardance magnitude and azimuth) at ALL POINTS of the image forming the field of view. The images document fine structural and molecular organization within a thin optical section of the specimen.

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