reagents were received from sigma aldrich chemical co. ( bangalore , karnataka , india ) and used without further purification .
solvents were purchased from commercial sources from hyderabad , telangana , indiabased companies and purified by reported protocols .
h and c  nmr spectra were recorded on bruker 300  mhz and 500  mhz machines and calibrated against tetramethylsilane ( tms ) .
mass spectrometric data were acquired by an electrospray ionization ( esi ) technique on a qtofmicro quadruple mass spectrometer . the stock solutions ( 110 
 m ) of ndin and ndina were prepared in chcl3 .
an aliquot of it was transferred to various ratios of chcl3/mch in different volumetric flasks ( final volume of 2  ml ) and allowed to equilibrate for 2  h prior to the uv / vis absorption measurements .
all experiments were performed upon excitation at 350  nm in a quartz cell with a 1  cm path length .
the stock solutions were prepared in a similar manner as for the absorption study and employed for emission measurements .
the stock solutions were prepared in chcl3 in a similar manner as for the uv / vis study .
sem images of ndin and ndina were recorded on an fei nova nanosem ( hillsboro , or usa ) operating at high vacuum . for sem imaging
, the samples of ndia and ndina were sputtercoated with gold for 10  s at 0.016  ma ar plasma after dropcasting the solutions on glass coverslip and solvent evaporation at rt .
tem samples were prepared by the paper blotting method followed by solvent evaporation on a holey carboncoated copper grid .
the liquid sample in chcl3/mch ( 5:95 , v / v ) was dropcasted and solvent was allowed to evaporate on the surface naturally .
reagents were received from sigma aldrich chemical co. ( bangalore , karnataka , india ) and used without further purification .
solvents were purchased from commercial sources from hyderabad , telangana , indiabased companies and purified by reported protocols .
h and c  nmr spectra were recorded on bruker 300  mhz and 500  mhz machines and calibrated against tetramethylsilane ( tms ) .
mass spectrometric data were acquired by an electrospray ionization ( esi ) technique on a qtofmicro quadruple mass spectrometer .
the stock solutions ( 110 
 m ) of ndin and ndina were prepared in chcl3 .
an aliquot of it was transferred to various ratios of chcl3/mch in different volumetric flasks ( final volume of 2  ml ) and allowed to equilibrate for 2  h prior to the uv / vis absorption measurements .
all experiments were performed upon excitation at 350  nm in a quartz cell with a 1  cm path length .
the stock solutions were prepared in a similar manner as for the absorption study and employed for emission measurements .
the stock solutions were prepared in chcl3 in a similar manner as for the uv / vis study .
sem images of ndin and ndina were recorded on an fei nova nanosem ( hillsboro , or usa ) operating at high vacuum . for sem imaging
, the samples of ndia and ndina were sputtercoated with gold for 10  s at 0.016  ma ar plasma after dropcasting the solutions on glass coverslip and solvent evaporation at rt .
tem samples were prepared by the paper blotting method followed by solvent evaporation on a holey carboncoated copper grid .
the liquid sample in chcl3/mch ( 5:95 , v / v ) was dropcasted and solvent was allowed to evaporate on the surface naturally .
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 abstractin the present work , two new naphthalene diimide ( ndi ) amphiphiles , ndin and ndina , were successfully synthesized and employed to investigate their selfassembly and optical properties . for ndina , which contains an amide group , aggregationinduced emission enhancement ( aiee ) was demonstrated in the presence of various ratios of methylcyclohexane ( mch ) in chloroform , which led to the visual color changes . 
 this new amidecontaining ndina amphiphile formed nanobelt structures in chloroform / mch ( 10:90 , v / v ) and microcuplike morphologies in chloroform / mch ( 5:95 , v / v ) . the closure of these microcups led to the formation of vesicles and microcapsules . 
 the structural morphologies gained from the solvophobic control of ndina were confirmed by various complementary techniques such as infrared spectroscopy , xray diffraction , and scanning and transmission electron microscopy . in the absence of the amide moiety in ndin , no selfassembly was observed , indicating the fundamental role of hbonding in the selfassociation process . 
Experimental Section
General methods and materials
UV/Vis absorption spectroscopy
Fluorescence spectroscopy
Sample preparation
Scanning electron microscopy
Transmission electron microscopy
Infrared spectroscopy
Supporting information