Light-responsive material containing a dye comprising two cyclodextrin groups

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a light-responsive material comprising a dye containing two or more cyclodextrin groups or derivatives thereof.
More preferably, the present invention provides light-responsive material comprising a dye containing two or more cyclodextrin groups or derivatives thereof and a compound which fluoresces light of a wavelength which can be absorbed by said dye.
Cyclodextrin groups which can be used in the present invention are compounds in which a number of D(+)-glucopyranose units are connected by the .
alpha.
1,4-bond to form a ring.
These compounds are prefixed by .
alpha.
(6 units), .
beta.
(7 units), .
gamma.
(8 units), and so on depending on the number of glucose units constituting one molecule thereof so that they are referred to as ".
alpha.
-cyclodextrin", ".
beta.
-cyclodextrin", ".
gamma.
-cyclodextrin", and so on, respectively.
Among these compounds, .
alpha.
, .
beta.
, and .
gamma.
-cyclodextrins are commercially available.
These there compounds are also referred to as "cyclohexaamylose", "cycloheptaamylose" and "cyclooctaamylose", respectively.
Furthermore, derivatives of these cyclodextrins obtained by substituted the hydroxyl groups there of with substituents such as ether groups, ester groups, amino groups, or the like are known.
These cyclodextrins are described in detail in L.
Bender and M.
Komiyama, Cyclodextrin Chemistry, Springer-Verlag Corporation (1978).
Examples of dyes which can be used for the preparation of the present dye containing two or more cyclodextrin groups or derivatives thereof (CD-dye, hereinafter referred to as "dye compound") include cyanine dyes, merocyanine dyes, composite cyanine dyes, composite merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes, and hemioxonol dyes.
particularly useful among these dyes are cyanine dyes, merocyanine dyes, composite cyanine dyes, and composite merocyanine dyes.
These dyes can comprise any nucleus which are commonly used for cyanine dyes as a basic heterocyclic nucleus