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We calculate the branching ratios and CP-violating asymmetries for $B^0\to\omega \eta $, $\omega \eta^\prime$, $\phi \eta$ and $\phi \eta^\prime$decays in the perturbative QCD (pQCD) factorization approach. The pQCDpredictions for the CP-averaged branching ratios are $Br(B^0 \to \omega\eta) =\left (2.7 ^{+1.1}_{-1.0})\times 10^{-7}$,  $Br(B^0 \to \omega \eta^\prime) = \left (0.75 ^{+0.37}_{-0.33}) \times10^{-7}$, and  $Br(B^0 \to \phi\eta) = \left (6.3 ^{+3.3}_{-1.9}) \times 10^{-9}$,  $Br(B^0 \to \phi\eta^{\prime}) = \left (7.3^{+3.5}_{-2.6}) \times 10^{-9}$which are consistent with currently available experimental upper limits. Theinclusion of the gluonic contribution can change the branching ratios of $B \to\omega(\phi) \eta^\prime$ decays by about 10%. The direct CP-violatingasymmetries for $B^0 \to \omega \eta$ and $\omega \eta^\prime$ decays aregenerally large in size.Comment: 23 pages, 4 ps/eps figures, RevTex, typos removed, minor correction

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

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B0→ωη(′)andϕη(