Tielens A G, Charnley S B
NASA Ames Research Center, Moffett Field, CA 94035, USA.
Orig Life Evol Biosph. 1997 Jun;27(1-3):23-51.
We review the formation and evolution of complex circumstellar and interstellar molecules. A number of promising chemical routes are discussed which may lead to the formation of polycyclic aromatic hydrocarbon molecules, fullerenes, and unsaturated hydrocarbon chains in the outflows from stars. Some of the problems with these chemical schemes are pointed out as well. We also review the role of grains in the formation of complex molecules in interstellar molecular clouds. This starts with the formation of simple molecules in an ice grain mantle. UV photolysis and/or thermal polymerization can convert some of these simple molecules into more complex polymeric structures. Some of these species may be released to the gas phase, particularly in the warm regions around newly formed stars. Methanol and formaldehyde seem to play an important role in this drive towards molecular complexity and their chemistry is traced in some detail.
我们回顾了复杂的恒星周围和星际分子的形成与演化。讨论了一些有前景的化学途径，这些途径可能导致在恒星外流中形成多环芳烃分子、富勒烯和不饱和烃链。同时也指出了这些化学方案存在的一些问题。我们还回顾了尘埃颗粒在星际分子云中复杂分子形成过程中的作用。这始于在冰粒幔层中形成简单分子。紫外线光解和/或热聚合可以将其中一些简单分子转化为更复杂的聚合物结构。其中一些物质可能会释放到气相中，特别是在新形成恒星周围的温暖区域。甲醇和甲醛似乎在这种向分子复杂性发展的过程中起着重要作用，并且对它们的化学性质进行了较为详细的追踪。
