Effective PET and ICT Switching of Boradiazaindacene Emission:  A Unimolecular, Emission-Mode, Molecular Half-Subtractor with Reconfigurable Logic Gates

Coskun, Ali; Deni̇z, Erhan; Akkaya, Engin U.

doi:10.1021/ol052020h

Cited by 275 publications

(127 citation statements)

References 15 publications

Supporting

Mentioning

124

Contrasting

Unclassified

Order By: Relevance

“…[29] Moreover, BODIPY-based dyes enter readily into charge-transfer processes such that their absorption and emission properties can be further adjusted by controlling the electron affinity of appended donor and/or acceptor groups. [30,31] This last A C H T U N G T R E N N U N G realization forms the basis of the operating mechanism for the sensors reported here.…”

Section: Introductionmentioning

confidence: 80%

Solid‐State Gas Sensors Developed from Functional Difluoroboradiazaindacene Dyes

Ziessel

Ulrich

Harriman

et al. 2009

Chemistry A European J

124

View full text Add to dashboard Cite

This article describes the synthesis and characterization of several new difluoroboradiazaindacene (BODIPY) dyes functionalized at the central 8-position by a phenyliodo, phenylheptynoate or phenylheptynoic fragment and at the 3- or 3/5-position(s) by 4-dimethylaminophenylstyryl residue(s). Single-crystal structural determinations confirm the planarity of the dyes, while the absorption and fluorescence spectroscopic properties are highly sensitive to the state of protonation (or alkylation) of the terminal anilino donor group(s). Reversible color tuning from green to blue for absorption and from colorless (i.e., near-IR region) to red for fluorescence is obtained on successive addition of acid and base. The difunctionalized derivative is especially interesting in this respect and shows two well-resolved pK(a) values of 5.10 and 3.04 in acetonitrile. Addition of the first proton causes only small spectral changes and deactivates the molecule towards addition of the second proton. It is this latter step that accommodates the large change in absorption and emission properties, due to the reversible extinction of the intramolecular charge-transfer character inherent to this type of dye. The main focus of the work is the covalent anchoring of the dyes to inert, porous polyacrylate beads so as to form a solid-state sensor suitable for analysis of gases or flowing liquids. The final material is highly stable--its performance is undiminished after more than one year--and fully reversible over many cycles. The sensitivity is such that reactions can be followed by the naked eye and the detection limit is about 600 ppb for HCl and about 80 ppb for ammonia. Trace amounts of diphosgene can be detected, as can alkylating agents. The sensing action is indiscriminate and also operates when the beads are dispersed in aqueous media.

show abstract

Section: Introductionmentioning

confidence: 80%

Solid‐State Gas Sensors Developed from Functional Difluoroboradiazaindacene Dyes

Ziessel

Ulrich

Harriman

et al. 2009

Chemistry A European J

124

View full text Add to dashboard Cite

show abstract

“…Arithmetic operations require combinations of two or more logic gates that carry out addition or subtraction. A number of molecular half-adders [1][2][3][4][5][6][7] and half-subtractors 4,5,8,9 have been described, or discussed theoretically. 10,11 These function through chemical inputs (e.g., acid, base, ions) that cause the switching operations.…”

Section: Introductionmentioning

confidence: 99%

All-Photonic Molecular Half-Adder

et al. 2006

View full text Add to dashboard Cite

One molecule acts as both an AND and an XOR Boolean logic gate that share the same two photonic inputs. The molecule comprises a half-adder, adding two binary digits with only light as inputs and outputs, and consists of three covalently linked photochromic moieties; a spiropyran and two quinoline-derived dihydroindolizines. The AND function is based on the absorption properties of the molecule, whereas the XOR function is based on an off-on-off response of the fluorescence to the inputs that results from interchromophore excited state quenching interactions. The half-adder is simple to operate, and can be cycled many times.

show abstract

“…Diese produzieren einen BORROW-(B) und ein DIFFERENCE-Output (D) (Schema 1), der in den [12,28,[32][33][34] Weitere INHIBITGatter werden in diesem Kurzaufsatz beschrieben. [14,17,19,20,22,24,25,35] Der Vollständigkeit halber sollte erwähnt werden, dass die binäre Multiplikation den gleichen Regeln wie die ANDWahrheitstabelle folgt (0 0 = 0, 1 0 = 0, 0 1 = 0, 1 1 = 1), während binäre Division das Resultat wiederholter Subtraktion ist, wie bei der dezimalen Division.…”

Section: Grundelemente Molekularer Rechnerunclassified

“…[35] Ohne [24] Ein Vollsubtrahierer erfordert zwei Halbsubtrahierer, wie in Schema 11 zusammen mit der zugehörigen Wahrheitstabelle gezeigt wird. Der DIFFERENCE-Output des ersten Halbsubtrahierers HS1 ist ein Input des zweiten Halbsubtrahierers (HS2).…”

Section: Halbaddierer Und Volladdiererunclassified

Chemische Strategien für den Aufbau molekularer Logikelemente zur Addition und Subtraktion

Pischel

2007

Angewandte Chemie

View full text Add to dashboard Cite

Molekulare und supramolekulare Logikgatter sind Kandidaten für die Realisierung von Computern auf der Nanoebene. Heutzutage können alle gebräuchlichen Logikoperationen mit molekularen Funktionseinheiten auf chemischer Basis nachgeahmt werden. Ein weiterer Schritt in Richtung molekularer Systeme mit verbesserten Logikkapazitäten ist die Addition oder Subtraktion von binären Ziffern. Dieser Kurzaufsatz beschreibt aktuelle Entwicklungen auf dem Weg zu diesem Ziel, einschließlich bioinspirierter Systeme, die auf DNA oder Enzymen basieren. Weiterhin werden chemische molekulare Logikgatter kritisch im Hinblick auf ihr Verhältnis zu alternativen Konzepten diskutiert.

show abstract

Effective PET and ICT Switching of Boradiazaindacene Emission: A Unimolecular, Emission-Mode, Molecular Half-Subtractor with Reconfigurable Logic Gates

Cited by 275 publications

References 15 publications

Solid‐State Gas Sensors Developed from Functional Difluoroboradiazaindacene Dyes

Solid‐State Gas Sensors Developed from Functional Difluoroboradiazaindacene Dyes

All-Photonic Molecular Half-Adder

Chemische Strategien für den Aufbau molekularer Logikelemente zur Addition und Subtraktion

Contact Info

Product

Resources

About