Photocontrolled extraction ability of azobenzene-bridged azacrown ether

Shinkai, Seiji; Ogawa, Tetsuro; Nakaji, Takahiro; Kusano, Yumiko; Nanabe, Osamu

doi:10.1016/s0040-4039(01)86651-x

Cited by 149 publications

(69 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[1][2][3] This is the first example of photoresponsive crown ethers as well as others subsequently reported. [4][5][6] We here wish to report a new photoresponsive "cryptand" (2) which has a crown ring bridged with an azopyridine and changes its binding ability toward heavy metal ions in response to photoirradiation.…”

supporting

confidence: 58%

“…We previously synthesized an azobenzene-bridged crown ether (1), aiming at photocontrolling the chemical and physical functions of crown ether family compounds.1,2) We found that the size of the crown ether of cis- (1) in which the azobenzene bridge is photoisomerized to the cis-form is somewhat greater than that of trans-(1). [1][2][3] This is the first example of photoresponsive crown ethers as well as others subsequently reported.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Photoresponsive Cryptand With an Azopyridine-Bridge

Shinkai¹,

Minami²,

Kouno³

et al. 1982

Chemistry Letters

Self Cite

View full text Add to dashboard Cite

A new photoresponsive “cryptand” with an azopyridine-bridge (2) was synthesized. Trans-(2) was able to extract heavy metal ions (Cu2+, Ni2+, Co2+, and Hg2+) from aqueous solution to organic (o-dichlorobenzene +n-butyl alcohol) phase, whereas photoisomerized cis-(2) scarcely extracted heavy metal ions. The difference is rationalized in terms of the structural change of the azopyridine-bridge which is induced by photo(u.v.)-irradiation.

show abstract

supporting

confidence: 58%

mentioning

confidence: 99%

Photoresponsive Cryptand With an Azopyridine-Bridge

Shinkai¹,

Minami²,

Kouno³

et al. 1982

Chemistry Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…[69g, 88,111] The light-responsive component might even be included in biological channels, as demonstrated by Feringa and co-workers when rendering large pore-forming mechanosensitive channel proteins, and thus the access to the hosting liposomes, photoswitchable. [112] Alternatively, photoswitchable foldamer hosts [113] might be equipped with internal catalytic functionalities.…”

Section: Discussionmentioning

confidence: 99%

Artificial Light‐Gated Catalyst Systems

2010

View full text Add to dashboard Cite

Having control over an entity or even an entire process is arguably the ultimate demonstration of its understanding and it will enable its potential to be fully exploited. With this in mind, chemists have not only been creating and optimizing a myriad of different catalysts for most (relevant) chemical reactions over the past decades, but have recently started to implement controlling elements into the catalyst design. These incorporated gates operate upon exposure to suitable control stimuli, and light represents perhaps the scientifically and technologically most attractive stimulus. In principle, irradiation can thereby induce activity and selectivity in a given catalyst system with high spatial and temporal control, leading to an overall localization and amplification of an optical signal and translation into chemical action. While nature has developed and utilized this concept, in particular in the processes of vision and photomovement, such artificial photocontrolled catalyst systems offer unique opportunities and have high potential for future applications. In this Review, we outline the general concept of light-gated catalysis based on photocaged and also photoswitchable systems, and discuss relevant examples of the past and recent literature.

show abstract

“…Control by light irradiation has been utilized as a dominant external stimulus against dynamic molecular recognition (22,23), Although many photoresponsive molecules have been reported, such as photoresponsive crown ethers (24,25), a photo-chemically driven molecular machine (26), a light-powered molecular pedal (27) and so on, these examples were based on a rigorous molecular design (commonly termed "rational design"). Therefore the design of the photo-responsive host molecule for arbitrary targets, which is structurally complicated or unknown, would be difficult and was not achieved.…”

Section: Photoresponsive Peptide Aptamermentioning

confidence: 99%

Creation of Functional Peptides by Evolutionary Engineering with Bioorthogonal Incorporation of Artificial Components

Tada

Uzawa

Ito

2015

ACS Symposium Series

View full text Add to dashboard Cite

Molecular evolutionary engineering is a method used to harness the power of natural selection to evolve proteins or RNA with desirable properties not found in nature. The possibility of evolving a commonly existing biomolecule into a variety of functional biomolecules has now been realized in the form of aptamers through the development of in vitro selection. In addition to their high affinity and high specificity for desired targets, aptamers are easily synthesized chemically and can be modified for downstream applications. Although aptamers were originally selected from a library containing only natural components, the past decade has seen a wealth of new aptamers selected from libraries containing unnatural components to provide new aptamer functions artificially. Here we highlight this transition (the shift between selection from natural components and selection from unnatural components) and the applications of the selected aptamers. For the selection, functional molecule was attached to tRNA through amino acid and the misacylated tRNA was incorporated into in vitro selection process.

show abstract

Photocontrolled extraction ability of azobenzene-bridged azacrown ether

Cited by 149 publications

References 4 publications

Photoresponsive Cryptand With an Azopyridine-Bridge

Photoresponsive Cryptand With an Azopyridine-Bridge

Artificial Light‐Gated Catalyst Systems

Creation of Functional Peptides by Evolutionary Engineering with Bioorthogonal Incorporation of Artificial Components

Contact Info

Product

Resources

About