About: Squaraine dye

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Squaraine dyes are a class of organic dyes showing intense fluorescence, typically in the red and near infrared region (absorption maxima are found between 630 and 670 nm and their emission maxima are between 650–700 nm). They are characterized by their unique aromatic four membered ring system derived from squaric acid. Most squaraines are encumbered by nucleophilic attack of the central four membered ring, which is highly electron deficient. This encumbrance can be attenuated by the formation of a rotaxane around the dye to protect it from nucleophiles. They are currently used as sensors for ions and have recently, with the advent of protected squaraine derivatives, been exploited in biomedical imaging.

Attributes	Values
rdf:type	yago:Abstraction100002137 yago:ColoringMaterial114984973 yago:Dye114985383 yago:Material114580897 yago:Matter100020827 yago:Part113809207 yago:PhysicalEntity100001930 yago:Relation100031921 chemical compound yago:Substance100019613 yago:WikicatDyes
rdfs:label	Squaraine (de) Squaraine dye (en)
rdfs:comment	Als Squaraine bezeichnet man seit 1980 eine Klasse von intensiven Farbstoffen, deren Basis die Quadratsäure bzw. deren Ester sind. Sie werden im deutschsprachigen Raum daher manchmal auch als Quadratsäurefarbstoffe bezeichnet, ältere – heute nicht mehr verwendete – Bezeichnungen sind Tetracyclotrimethine, Cyclobutendiylium-Farbstoffe oder substituierte Oxocyclobutenolate. (de) Squaraine dyes are a class of organic dyes showing intense fluorescence, typically in the red and near infrared region (absorption maxima are found between 630 and 670 nm and their emission maxima are between 650–700 nm). They are characterized by their unique aromatic four membered ring system derived from squaric acid. Most squaraines are encumbered by nucleophilic attack of the central four membered ring, which is highly electron deficient. This encumbrance can be attenuated by the formation of a rotaxane around the dye to protect it from nucleophiles. They are currently used as sensors for ions and have recently, with the advent of protected squaraine derivatives, been exploited in biomedical imaging. (en)
foaf:depiction
dcterms:subject	Cyclobutenes Fluorescent dyes
Wikipage page ID	7871483 (xsd:integer)
Wikipage revision ID	984467923 (xsd:integer)
Link from a Wikipage to another Wikipage	Electrophilic aromatic substitution Carbon nanotubes Cyclobutenes Fluorescent dyes Quantum yield Optical properties of carbon nanotubes dbr:Aniline Rotaxane Fluorescence dbr:Dichloromethane Squaric acid Raman scattering Luminescence Electron deficient Nucleophilic attack dbr:Wikt:encumbered
sameAs	Squaraine dye Squaraine dye Squaraine dye Squaraine dye Squaraine dye
dbp:wikiPageUsesTemplate	dbt:Reflist
thumbnail	wiki-commons:Special:FilePath/Squarainedyes.png?width=300
has abstract	Als Squaraine bezeichnet man seit 1980 eine Klasse von intensiven Farbstoffen, deren Basis die Quadratsäure bzw. deren Ester sind. Sie werden im deutschsprachigen Raum daher manchmal auch als Quadratsäurefarbstoffe bezeichnet, ältere – heute nicht mehr verwendete – Bezeichnungen sind Tetracyclotrimethine, Cyclobutendiylium-Farbstoffe oder substituierte Oxocyclobutenolate. (de) Squaraine dyes are a class of organic dyes showing intense fluorescence, typically in the red and near infrared region (absorption maxima are found between 630 and 670 nm and their emission maxima are between 650–700 nm). They are characterized by their unique aromatic four membered ring system derived from squaric acid. Most squaraines are encumbered by nucleophilic attack of the central four membered ring, which is highly electron deficient. This encumbrance can be attenuated by the formation of a rotaxane around the dye to protect it from nucleophiles. They are currently used as sensors for ions and have recently, with the advent of protected squaraine derivatives, been exploited in biomedical imaging. (en)
gold:hypernym	Dyes
prov:wasDerivedFrom	wikipedia-en:Squaraine_dye?oldid=984467923&ns=0
page length (characters) of wiki page	4894 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Squaraine_dye
is Link from a Wikipage to another Wikipage of	Rotaxane Squaric acid Two-photon excitation microscopy Squarine Squaraine Squarylium
is Wikipage redirect of	Squarine Squaraine Squarylium
is foaf:primaryTopic of	wikipedia-en:Squaraine_dye

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