▎ 摘　　要

NOVELTY - A graphene nanoribbon precursor comprises 10-(heptacyclo(20.8.0)triaconta-1(22),2(11),3,5,7,9,13,15,17,19,23,25,27,29-tetradecaen-10-yl)heptacyclo(20.8.0)triaconta-1(30),2,4,6,8,10,12,14(19),15,17,20,22,24,26,28-pentadecaene compound (I). When the desorption temperatures of X and Y' from the carbon atoms constituting the six-membered ring are TX and TY', respectively, the desorption temperature (TX) is less than the desorption temperature (TY'). USE - Precursor used for forming graphene nanoribbon for electronic device (all claimed). ADVANTAGE - The bandgap of graphene nanoribbon can be modulated in various ways. DETAILED DESCRIPTION - A graphene nanoribbon precursor comprises 10-(heptacyclo(20.8.0)triaconta-1(22),2(11),3,5,7,9,13,15,17,19,23,25,27,29-tetradecaen-10-yl)heptacyclo(20.8.0)triaconta-1(30),2,4,6,8,10,12,14(19),15,17,20,22,24,26,28-pentadecaene compound of formula (I). When the desorption temperatures of X and Y' from the carbon atoms constituting the six-membered ring are TX and TY', respectively, the desorption temperature (TX) is less than the desorption temperature (TY'). n = 1, 2 or 4; m = n-1;and X,Y' = F, Cl, Br or I. INDEPENDENT CLAIMS are included for the following: (1) electronic device, which comprises the graphene nanoribbon in a channel of a field effect transistor; (2) production of graphene nanoribbons, which involves heating the graphene nanoribbon precursor to a temperature (T1) on a metal substrate to induce desorption of X and a CC binding reaction to obtain a polymer on the metal substrate, and heating the polymer to a temperature (T2) higher than the temperature (T1) to induce the elimination of Y' and the CC bond reaction; and (3) manufacture of electronic device, which involves producing graphene nanoribbons on the metal substrate, and forming a transistor comprising the graphene nanoribbon in the channel.