Two new dendronized azochromophores were synthesized. They consisted of 4’-[N-(2-hydroxyethyl)-N-methyl]amino-2-(2-hydroxyethoxy)-4-nitroazobenzene core, which OH groups were esterified with 3,5-dibenzyloxybenzoic acid (compound LL75) and 3,5-bis(2,3,4,5,6-pentafluorobenzyloxy)benzoic acid (compound LL82). Light absorption maxima in CHCl3 solution were 479.1 nm for compound LL75 and 476.3 nm for compound LL82. A third sample LL50/50 was prepared mixing compounds LL75 and LL82 together in equimolar proportions. Light absorption maxima of all compounds in CHCl3 solution were in the range 476.3-480.2 nm. Self-diffraction efficiency (SDE) exposure time dependences have been measured for all samples by two equal intensity p-p polarized 532 nm and 632.8 nm laser beams. The distinct peculiarity of all samples was a very fast (<1s), almost jump-like initial SDE increase, especially in the 532 nm case. The best holographic parameters have been achieved in the case of LL50/50 samples at 532 nm: SDEmax=0.010%, specific recording energy 5.1 J(cm2%). The initial photosensitivity, obviously, is much higher than mentioned. However, to measure it higher temporal resolution is necessary than in our experiments. Two new dendronized azochromophores were synthesized. They consisted of 4’-[N-(2-hydroxyethyl)-N-methyl]amino-2-(2-hydroxyethoxy)-4-nitroazobenzene core, which OH groups were esterified with 3,5-dibenzyloxybenzoic acid (compound LL75) and 3,5-bis(2,3,4,5,6-pentafluorobenzyloxy)benzoic acid (compound LL82). Light absorption maxima in CHCl3 solution were 479.1 nm for compound LL75 and 476.3 nm for compound LL82. A third sample LL50/50 was prepared mixing compounds LL75 and LL82 together in equimolar proportions. Light absorption maxima of all compounds in CHCl3 solution were in the range 476.3-480.2 nm. Self-diffraction efficiency (SDE) exposure time dependences have been measured for all samples by two equal intensity p-p polarized 532 nm and 632.8 nm laser beams. The distinct peculiarity of all samples was a very fast (<1s), almost jump-like initial SDE increase, especially in the 532 nm case. The best holographic parameters have been achieved in the case of LL50/50 samples at 532 nm: SDEmax=0.010%, specific recording energy 5.1 J(cm2%). The initial photosensitivity, obviously, is much higher than mentioned. However, to measure it higher temporal resolution is necessary than in our experiments. Two new dendronized azochromophores were synthesized. They consisted of 4’-[N-(2-hydroxyethyl)-N-methyl]amino-2-(2-hydroxyethoxy)-4-nitroazobenzene core, which OH groups were esterified with 3,5-dibenzyloxybenzoic acid (compound LL75) and 3,5-bis(2,3,4,5,6-pentafluorobenzyloxy)benzoic acid (compound LL82). Light absorption maxima in CHCl3 solution were 479.1 nm for compound LL75 and 476.3 nm for compound LL82. A third sample LL50/50 was prepared mixing compounds LL75 and LL82 together in equimolar proportions. Light absorption maxima of all compounds in CHCl3 solution were in the range 476.3-480.2 nm. Self-diffraction efficiency (SDE) exposure time dependences have been measured for all samples by two equal intensity p-p polarized 532 nm and 632.8 nm laser beams. The distinct peculiarity of all samples was a very fast (<1s), almost jump-like initial SDE increase, especially in the 532 nm case. The best holographic parameters have been achieved in the case of LL50/50 samples at 532 nm: SDEmax=0.010%, specific recording energy 5.1 J(cm2%). The initial photosensitivity, obviously, is much higher than mentioned. However, to measure it higher temporal resolution is necessary than in our experiments.