Based on a sample of

2.25 \times 10^{8} J / ψ

events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay

J / ψ \to η ϕ π^{+} π^{-}

. The

Y (2175)

resonance is observed in the invariant mass spectrum of

ϕ f_{0} (980)

with a statistical significance of greater than

10 σ

. The corresponding mass and width are determined to be

M = 2200 \pm 6 (stat) \pm 5 (syst) MeV / c^{2}

and

Γ = 104 \pm 15 (stat) \pm 15 (syst) MeV

, respectively, and the product branching fraction is measured to be

B (J / ψ \to η Y (2175), Y (2175) \to ϕ f_{0} (980), f_{0} (980) \to π^{+} π^{-}) = (1.20 \pm 0.14 (stat) \pm 0.37 (syst)) \times 10^{- 4}

. The results are consistent within errors with those of previous experiments. We also measure the branching fraction of

J / ψ \to ϕ f_{1} (1285)

with

f_{1} (1285) \to η π^{+} π^{-}

and set upper limits on the branching fractions for

J / ψ \to ϕ η (1405) / ϕ X (1835) / ϕ X (1870)

with

η (1405) / X (1835) / X (1870) \to η π^{+} π^{-}

at the 90% confidence level.

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