US 8,449,985 B2  8  7  device is provided comprising at least a layer comprising a  polymer according to any embodiments of the third or fifth  aspect.  In an eighth aspect, fabrication of such opto-electronic  devices is provided, in particular including the deposition of  at least one thin polymer layer according to the third or fifth  aspect. In an embodiment of the eighth aspect, a method is  provided of manufacturing an electronic device according to  the seventh aspect, said method comprising the steps of  applying a polymer according to third aspect on a substrate  and subjecting said polymer to a heat treatment and/or an acid  treatment so as to convert said polymer into a polymer accord› ing to the fifth aspect.  In a nutshell, the various aspects of the preferred embodi› ments enable the use of poly(iptycenylene vinylene) deriva› tives in plastic electronics thanks to, among others, the easy  synthetic availability of the polymers via a soluble precursor  permitting their manufacture on a large scale.  Embodiments present numerous advantages when com› pared to alternative solutions of the prior art. In particular,  compared to a Gilch-like route, embodiments have the advan- tage ofleading to polymers that can also be insoluble in their  conjugated form. A Gilch-like route is a one-pot polymeriza› tion process which only allows the synthesis of soluble con› jugated polymers; it is not a precursor route as is the case in  the preferred embodiments.  Compared to the method ofU.S. Pat. No. 5,817,430, which  is a side chain approach like the Gilch route, the method  according to the preferred embodiments does not require the  use of chain end controlling additives to control the molecular  weight in order to get soluble conjugated polymers. The  method described according to various embodiments is a  "precursor method" which does not require control of the  polymer molecular weight. The resulting precursor polymers  are always soluble polymers, whatever their molecular  weight, and are soluble in common organic solvents (as  defined above) even for very high molecular weights. The  related soluble or insoluble conjugated polymers may easily  be obtained in a second step by a conversion or elimination  reaction under thermal treatment. When the conjugated poly› mer is insoluble in common organic solvents (as defined  above), the elimination reaction may preferably be carried out  on a thin film of the precursor polymer. When the conjugated  polymer is soluble in common organic solvents (as defined  above), the elimination reaction may be carried out either in  solution or on thin polymer films.  These and other characteristics, features and advantages of  the preferred embodiments will become apparent from the  following detailed description.  FIG.  1 is the absorption (ab), excitation (ex) and emission  (em) spectra of a polymer according to an embodiment in  spin-cast film.  FIG. 2 is the absorption (ab), excitation (ex) and emission  (em) spectra of a polymer according to an embodiment in  spin-cast film.  FIG. 3 is a graph showing the time (T) dependence of the  fluorescence intensity  (IEM)  of a thin film according to an  embodiment upon exposure to an analyte.  BRIEF DESCRIPTION OF THE DRAWINGS  DETAILED DESCRIPTION OF THE PREFERRED  EMBODIMENT  Definitions  As used herein and unless stated otherwise, the terms "C$_{1}$ _ 7  alkyl" and "aliphatic saturated hydrocarbon radicals with 1 to  As used herein and unless stated otherwise, the terms  "aryl" and "aromatic substituent" are interchangeable and are  broad terms, and are to be given their ordinary and customary  meaning to a person of ordinary skill in the art ( and are not to  be limited to a special or customized meaning), and refer  without limitation to any mono- or polycyclic aromatic  As used herein and unless stated otherwise, the term "alky› laryl" is a broad term, and is to be given its ordinary and  customary meaning to a person of ordinary skill in the art ( and  is not to be limited to a special or customized meaning), and  refers without limitation to an aryl group having one or more  alkyl substituents attached to the aryl group.  As used herein and unless provided otherwise, the term  "arylalkyl" is a broad term, and is to be given its ordinary and  customary meaning to a person of ordinary skill in the art ( and  is not to be limited to a special or customized meaning), and  refers without limitation to an acyclic alkyl radical in which  one of the hydrogen atoms bonded to a carbon atom, typically  a terminal or sp $^{3 }$carbon atom, is replaced with an aryl radical.  Typical arylalkyl groups include, but are not limited to, ben- zyl, 2-phenylethan-1-yl, naphthylmethyl, 2-naphthylethan-1- yl, naphthobenzyl, 2-naphthophenylethan-1-yl and the like.  The arylalkyl group can comprise 6 to 20 carbon atoms, e.g.,  the alkyl moiety, including alkanyl, alkenyl or alkynyl  groups, of the arylalkyl group is 1 to 6 carbon atoms and the  aryl moiety is 5 to 14 carbon atoms.  As used herein and unless stated otherwise, the terms  "C$_{3}$ _ 10  cycloalkyl",  "cyclic  C$_{3}$-C$_{10}$-alkyl  group"  and  "cycloaliphatic saturated hydrocarbon radical with 3 to 10  carbon atoms" are interchangeable terminology, and are to be  given their ordinary and customary meaning to a person of  ordinary skill in the art (and are not to be limited to a special  or customized meaning), and refer without limitation to a  mono- or polycyclic saturated hydrocarbon monovalent radi› cal having from 3 to 10 carbon atoms, such as for instance  cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclohep› tyl, cyclooctyl and the like, or a C$_{7}$ _ $_{10 }$polycyclic saturated  hydrocarbon monovalent radical having from 7 to 10 carbon  atoms such as, for instance, norbomyl, fenchyl, trimethyltri› cycloheptyl or adamantyl. Similarly, a cyclic C$_{3}$ -C$_{20}$-alkyl  group designating a mono- or polycyclic saturated hydrocar› bon monovalent radical having from 3 to 20 carbon atoms.  As used herein with respect to a substituting radical, and  unless otherwise stated, the term "C$_{1}$_ 7  alkylene" is a broad  term, and is to be given its ordinary and customary meaning to  a person of ordinary skill in the art ( and is not to be limited to  a special or customized meaning), and refers without limita› tion to the divalent hydrocarbon radical corresponding to the  above defined C$_{1}$ _ $_{7 }$alkyl, such as methylene, bis(methylene ),  tris(methylene ), tetramethylene, hexamethylene and the like.  The terms "C$_{1}$ _ 10  alkylene" and "C$_{1}$ _ 20  alkylene", refer to  alkylenes having 1-10 and 1-20 carbon atoms, respectively.  7 carbon atoms" are broad terms, and are to be given their  ordinary and customary meaning to a person of ordinary skill  in the art ( and are not to be limited to a special or customized  meaning), and refer without limitation to straight and  branched chain saturated acyclic hydrocarbon monovalent  radicals having from 1 to 7 carbon atoms such as, for example,  methyl, ethyl, propyl, n-butyl, 1-methylethyl (isopropyl),  2-methylpropyl (isobutyl),  1,1-dimethylethyl (ter-butyl),  2-methylbutyl, n-pentyl, dimethylpropyl, n-hexyl, 2-methyl› pentyl, 3-methylpentyl, n-heptyl and the like; the term "C$_{1}$ -4  alkyl" designate the corresponding radicals with only 1 to 4  carbon atoms, the term "C$_{1}$ _ $_{10 }$alkyl" designate the corre› sponding radicals with only 1 to 10 carbon atoms, the term  "C$_{1}$ _ $_{20 }$alkyl" designates the corresponding radicals with only  1 to 20 carbon atoms, and so on. 