The synthesis of 3H-naphtho[2,1-b]pyrans 9–21 linked to a thiophene moiety is described. Two different synthetic approaches were applied to prepare these novel functionalized compounds, and their spectrokinetic properties in solution are reported.
3的合成ħ -萘并[2,1- b ]吡喃9 - 21连接于噻吩部分进行说明。两种不同的合成方法被用于制备这些新颖的功能化化合物,并报道了它们在溶液中的光谱动力学性质。
Structure-property relationships in a series of photochromic thiophene-substituted 3H-naphtho [2,1-b]pyrans
The photochromic parameters of a set of 26 thiophene-substituted [3H]-naphtho[2,1-b]pyrans were studied by flash photolysis. The experimental results obtained along with molecular modelling approaches (molecular mechanics and quantum calculations) allowed us to propose structure-property relationships. From this approach, the main structural modifications able to induce large variations in electronic absorption, fading rates and coloration ability are discussed. Copyright (C) 2000 John Wiley & Sons, Ltd.