As shown in Figure 6 a Δd is significantly affected by interchanging the locations, but a clear trend only emerges in dyes containing OMe, where placing the electron-donating group on position 5 increases Δd.
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Effect of Substituent Location on the Relationship between the Transition Dipole Moments, Difference Static Dipole, and Hydrophobicity in Squaraine Dyes for Quantum Information Devices.
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