It is even possible that short-range contributions to the electronic coupling arising from intermolecular orbital overlap may be significant, as has been found to be the case in other tightly packed aggregates. 32 − 34 To obtain a rough estimate of the extent of short-range effects, we calculated the hole ( t h ) and electron ( t e ) transfer Integrals for five representative TYR dimers present in close proximity (interaromatic distance
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