Thermal and photochemical properties of 4′,7-dihydroxyflavylium in water-ionic liquid biphasic systems: a write-read-erase molecular switch

Fernando Pina; João C. Lima; A. Jorge Parola; Carlos M. Afonso

doi:10.1002/anie.200353131

Thermal and photochemical properties of 4′,7-dihydroxyflavylium in water-ionic liquid biphasic systems: a write-read-erase molecular switch

Fernando Pina, João C. Lima, A. Jorge Parola, Carlos M. Afonso

Research output: Contribution to journal › Article › peer-review

65 Citations (Scopus)

Abstract

Switching colors: 4′,7-Dihydroxyflavylium (AH⁺) in water-ionic liquid biphasic systems can be used as a write-read-erase system. In acid media, the chalcone (Ct) form is soluble in ionic liquids and is thermally metastable, but reacts photochemically (write) to give the yellow flavylium salt, which can be optically read without being erased. The system is prepared for a new cycle by two consecutive pH "jumps".

Original language	English
Pages (from-to)	1525-1527
Number of pages	3
Journal	Angewandte Chemie - International Edition
Volume	43
Issue number	12
DOIs	https://doi.org/10.1002/anie.200353131
Publication status	Published - 12 Mar 2004

Keywords

Ionic liquids
Molecular switches
Optical memory
Photochemistry

Access to Document

10.1002/anie.200353131Licence: CC BY-NC

Cite this

@article{5e0b025ec6ba458f9ac7ff49ed46b08c,

title = "Thermal and photochemical properties of 4′,7-dihydroxyflavylium in water-ionic liquid biphasic systems: a write-read-erase molecular switch",

abstract = "Switching colors: 4′,7-Dihydroxyflavylium (AH+) in water-ionic liquid biphasic systems can be used as a write-read-erase system. In acid media, the chalcone (Ct) form is soluble in ionic liquids and is thermally metastable, but reacts photochemically (write) to give the yellow flavylium salt, which can be optically read without being erased. The system is prepared for a new cycle by two consecutive pH {"}jumps{"}.",

keywords = "Ionic liquids, Molecular switches, Optical memory, Photochemistry",

author = "Fernando Pina and Lima, {Jo{\~a}o C.} and Parola, {A. Jorge} and Afonso, {Carlos M.}",

year = "2004",

month = mar,

day = "12",

doi = "10.1002/anie.200353131",

language = "English",

volume = "43",

pages = "1525--1527",

journal = "Angewandte Chemie - International Edition",

issn = "1433-7851",

publisher = "John Wiley & Sons, Ltd.",

number = "12",

}

TY - JOUR

T1 - Thermal and photochemical properties of 4′,7-dihydroxyflavylium in water-ionic liquid biphasic systems: a write-read-erase molecular switch

AU - Pina, Fernando

AU - Lima, João C.

AU - Parola, A. Jorge

AU - Afonso, Carlos M.

PY - 2004/3/12

Y1 - 2004/3/12

N2 - Switching colors: 4′,7-Dihydroxyflavylium (AH+) in water-ionic liquid biphasic systems can be used as a write-read-erase system. In acid media, the chalcone (Ct) form is soluble in ionic liquids and is thermally metastable, but reacts photochemically (write) to give the yellow flavylium salt, which can be optically read without being erased. The system is prepared for a new cycle by two consecutive pH "jumps".

AB - Switching colors: 4′,7-Dihydroxyflavylium (AH+) in water-ionic liquid biphasic systems can be used as a write-read-erase system. In acid media, the chalcone (Ct) form is soluble in ionic liquids and is thermally metastable, but reacts photochemically (write) to give the yellow flavylium salt, which can be optically read without being erased. The system is prepared for a new cycle by two consecutive pH "jumps".

KW - Ionic liquids

KW - Molecular switches

KW - Optical memory

KW - Photochemistry

UR - http://www.scopus.com/inward/record.url?scp=4544369391&partnerID=8YFLogxK

U2 - 10.1002/anie.200353131

DO - 10.1002/anie.200353131

M3 - Article

C2 - 15022223

AN - SCOPUS:4544369391

SN - 1433-7851

VL - 43

SP - 1525

EP - 1527

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 12

ER -

Thermal and photochemical properties of 4′,7-dihydroxyflavylium in water-ionic liquid biphasic systems: a write-read-erase molecular switch

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this