Theoretical Study of Effect of the Number of N,N-dimethyl-4-nitroaniline Units in Novel “Parallel Connection” Chromophores on Its Nonlinear Optical Properties

<table>The structures of <b>1DMNA</b> and <b>2DMNA </b>optimized by DFT and atomic charges (unit: atomic unit) of N and O atoms (the numbers in brackets are charges of nitro and dimethylamino groups).</table>

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Figure 2

Figure 2: Theoretical Study of Effect of the Number of N,N-dimethyl-4-nitroaniline Units in Novel “Parallel Connection” Chromophores on Its Nonlinear Optical Properties 

Figure 2 | Theoretical Study of Effect of the Number of N,N-dimethyl-4-nitroaniline Units in Novel “Parallel Connection” Chromophores on Its Nonlinear Optical Properties 