scholarly journals Fluorescence switching of sanguinarine in micellar environments

2015 ◽  
Vol 17 (32) ◽  
pp. 20725-20732 ◽  
Author(s):  
Sagar Satpathi ◽  
Krishna Gavvala ◽  
Partha Hazra
Keyword(s):  
Benzylisoquinoline Alkaloid ◽  
Fluorescence Switch ◽  
Fluorescence Switching

Conversion from iminium to alkanolamine form of Sanguinarine, a key member of benzylisoquinoline alkaloid family, is monitored in micellar environments by fluorescence switch.

Non-invasive fluorescence switch in polymer films based on spiropyran-photoacid modified TPE

2018 ◽  
Vol 6 (8) ◽  
pp. 2113-2122 ◽  
Author(s):  
Qi Yu ◽  
Xing Su ◽  
Ting Zhang ◽  
Yu-Mo Zhang ◽  
Minjie Li ◽  
...  
Keyword(s):  
Polymer Films ◽  
High Contrast ◽  
Non Invasive ◽  
Fluorescence Switch ◽  
Fluorescence Switching

High-contrast fluorescence switching has been achieved in polymer films or fibers with non-invasive stimuli.

Efficient Synthesis and Properties of a Photochromic Diarylethene Bearing Thiophene and Isoxazole Moieties

2011 ◽  
Vol 295-297 ◽  
pp. 1070-1073
Author(s):  
Hong Liang Liu ◽  
Gang Liu ◽  
Shi Qiang Cui ◽  
Wei Jun Liu
Keyword(s):  
Uv Light ◽  
Amorphous Film ◽  
Optical Storage ◽  
Efficient Synthesis ◽  
Fluorescent Properties ◽  
Strong Fluorescence ◽  
Closed Ring ◽  
Fluorescence Switch ◽  
Open Ring ◽  
Fluorescence Switching

A novel photochromic diarylethene based on isoxazole moiety was synthesized and its photochromic and fluorescent properties were also investigated. This compound exhibited reversible photochromism, changing from colorless to red after irradiation with UV light both in solution and in poly-methyl methacrylate (PMMA) amorphous film. Also, it exhibited remarkable fluorescence switching in the solid state. The results showed that the diarylethene exhibited a relatively strong fluorescence switch along with the photochromism from open-ring isomer to closed-ring isomer. Using this dithienylethene 1c as optical storage was performed successfully.

Synthesis and Properties of [1-(2-Methyl-5-pheyl-3-thienyl)-2-(2-methyl-5-(4-cyanophenyl)-3-thienyl]perfluorocyclopentene for Fluorescence Switch

2014 ◽  
Vol 886 ◽  
pp. 151-154
Author(s):  
Hong Jing Jia ◽  
Xu Gang Tang ◽  
Shou Zhi Pu
Keyword(s):  
Data Storage ◽  
Optical Data Storage ◽  
Optical Data ◽  
Closed Ring ◽  
Fluorescence Switch ◽  
Switching Property ◽  
Open Ring ◽  
Fluorescence Switching ◽  
Potential Use ◽  
Hexane Solution

A novel unsymmetrical photochromic diarylethene 1o, which is named [1-(2-Methyl-5-pheyl-3-thienyl)-2-(2-methyl-5-(4-cyanophenyl)-3-thienyperfluorocyclopentene, was synthesized and its structure authenticated. What is more, photochromic, kinetics and fluorescence properties of the diarylethene were investigated in detail. The result indicated that this diarylethene photochromism could be controlled by UV-Vis light, changing the color from colorless to blue in hexane solution upon appropriate irradiation with 297 nm light, respectively. Its In the meantime, the kinetic experiments illustrated that the cyclization/cycloreversion process of this compound was determined to be the zeroth/first reaction. In addition, the fluorescence intensity of diarylethene decreased dramatically from open-ring isomer to closed-ring isomer. The fluorescence switching property can be potential use for optical data storage.

Naphthalene containing amino-ether macrocycle based Cu(ii) templated [2]pseudorotaxanes and OFF/ON fluorescence switching via axle substitution

2018 ◽  
Vol 47 (38) ◽  
pp. 13408-13418 ◽  
Author(s):  
Somnath Bej ◽  
Pradyut Ghosh
Keyword(s):  
Fluorescence Switch ◽  
Fluorescence Switching ◽  
Amino Ether

A newly synthesized naphthalene containing macrocycle is employed towards the development of Cu(ii) templated [2]pseudorotaxanes. Furthermore, a fluorophoric axle threaded [2]pseudorotaxane is explored as an “OFF/ON” fluorescence switch through the axle substitution.

TISSUE DISTRIBUTION OF TRANSCRIPTS INVOLVED IN BIOSYNTHESIS OF BENZYLISOQUINOLINE ALKALOID IN MATURE PLANTS OF Argemone mexicana L. (Papaveraceae)

2018 ◽  
Vol 41 (1) ◽  
pp. 13-21 ◽  
Author(s):  
Felipe Vázquez-Flota ◽  
Jorge Rubio-Piña ◽  
Jorge Xool-Tamayo ◽  
Mariela Vergara-Olivares ◽  
Yahaira Tamayo-Ordoñez ◽  
...  
Keyword(s):  
Tissue Distribution ◽  
Transport Mechanism ◽  
Gene Products ◽  
Argemone Mexicana ◽  
Benzylisoquinoline Alkaloid ◽  
Stems And Leaves ◽  
Specific Reactions

The distribution of berberine and sanguinarine was analyzed in roots, stems and leaves of mature Argemone mexicana plants, along with that of transcripts corresponding to selected genes involved in both early biosynthetic reactions, which are common to both alkaloids, and in the late specific reactions conducting to the formation of each of them. Roots were the main sites of alkaloid accumulation, though they showed the lowest accumulation of the analyzed transcripts. Results are discussed in terms of the operation of a possible transport mechanism of alkaloids between the aerial tissues and the roots, or the occurrence of different biosynthetic alternative reactions in both parts, aerial and underground tissues, involving different gene products, yet with similar catalytic capacities.

Hybrid nanoparticle based fluorescence switch for recognition of ketoprofen in aqueous media

2020 ◽  
Vol 5 (8) ◽  
pp. 1428-1436
Author(s):  
Anu Saini ◽  
Manpreet Kaur ◽  
Mayank ◽  
Anil Kuwar ◽  
Navneet Kaur ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Fluorescent Chemosensors ◽  
Fluorescence Switch ◽  
Nanomolar Detection ◽  
Hybrid Nanoparticle

Hybrid nanoassembly, fluorescent chemosensors, selective response to ketoprofen, and nanomolar detection.

pH-Sensitive Fluorescence Switching of Pyridylanthracenes: The Effect of the Isomeric Pattern

2020 ◽  
Vol 124 (52) ◽  
pp. 11017-11024
Author(s):  
Toni Haubitz ◽  
Werner Fudickar ◽  
Torsten Linker ◽  
Michael U. Kumke
Keyword(s):  
Ph Sensitive ◽  
Fluorescence Switching

scholarly journals Rubbing induced reversible fluorescence switching in thiophene derivate organic semiconductor film by mechanical amorphisation

2021 ◽  
Author(s):  
Massimiliano Cavallini ◽  
Ilse Manet ◽  
Marco Brucale ◽  
Laura Favaretto ◽  
Manuela Melucci ◽  
...  
Keyword(s):  
Thin Films ◽  
Organic Semiconductor ◽  
Semiconductor Film ◽  
Semiconductor Thin Films ◽  
Fluorescence Switching ◽  
Polymorphic Nature

Here, we applied rubbing on thiophene derivate organic semiconductor thin films to induce a reversible mechanical amorphisation. Amorphisation is associated with fluorescence switching, which is regulated by the polymorphic nature...

scholarly journals Transcriptional Profiles of Secondary Metabolite Biosynthesis Genes and Cytochromes in the Leaves of Four Papaver Species

Data ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 55 ◽  
Author(s):  
Dowan Kim ◽  
Myunghee Jung ◽  
In Ha ◽  
Min Lee ◽  
Seok-Geun Lee ◽  
...  
Keyword(s):  
Secondary Metabolite ◽  
Developmental Stages ◽  
Expression Profiles ◽  
Bioinformatics Analyses ◽  
Kegg Pathways ◽  
Benzylisoquinoline Alkaloid ◽  
Development Life Cycle ◽  
The Family ◽  
Leaf Transcriptome ◽  
Secondary Metabolite Biosynthesis

Poppies are well-known plants in the family Papaveraceae that are rich in alkaloids. This family contains 61 species, and in this study we sequenced the transcriptomes of four species’ (Papaver rhoeas, Papaver nudicaule, Papaver fauriei, and Papaver somniferum) leaves. These transcripts were systematically assessed for the expression of secondary metabolite biosynthesis (SMB) genes and cytochromes, and their expression profiles were assessed for use in bioinformatics analyses. This study contributed 265 Gb (13 libraries with three biological replicates) of leaf transcriptome data from three Papaver plant developmental stages. Sequenced transcripts were assembled into 815 Mb of contigs, including 226 Mb of full-length transcripts. The transcripts for 53 KEGG pathways, 55 cytochrome superfamilies, and benzylisoquinoline alkaloid biosynthesis (BIA) were identified and compared to four other alkaloid-rich genomes. Additionally, 22 different alkaloids and their relative expression profiles in three developmental stages of Papaver species were assessed by targeted metabolomics using LC-QTOF-MS/MS. Collectively, the results are given in co-occurrence heat-maps to help researchers obtain an overview of the transcripts and their differential expression in the Papaver development life cycle, particularly in leaves. Moreover, this dataset will be a valuable resource to derive hypotheses to mitigate an array of Papaver developmental and secondary metabolite biosynthesis issues in the future.

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